APPLICATIONS OF FIBER OPTICS FILTERS

7/30/2019 APPLICATIONS OF FIBER OPTICS FILTERS

1/8

Fagbw Gwkoo Owk~aco kcn Fkgwq(Pbwd~ Dp~amkl Fal~bw}

PLKGKC PWKÂH GERQKCNBPKW^HBC^ DF BLBM^WDC AM] KCN MDHHRCAMKÂDC,

NDC GD]MD MDLLBOB DF BCOACBBWACO KCN ^BMECDLDOQ, OR_KEKÂ, K]]KH

Bhkal: plkgkc;110@ohkal#mdh

Kg}~wkm~ ea} pkpbw mdc~kac} nb~kalbn nb}mwap~adc df Fagbw

Gwkoo Owk~aco kcn Fkgwq(Pbwd~ dp~amkl fal~bw} kcn ~ebaw

kpplamk~adc} ac ~eb pwb}bc~ nkq dwln#

Ibqdwn}Dp~amkl fal~bw}, FGO dp~amkl fal~bw}, Fkgwq(Pbwd~

dp~amkl fal~bw}

A# DPÂMKLFAL^BW]%AC^WDNRMÂDC!:Dp~amkl fal~bw} kwb nbvamb} ~ek~ }blbm~avblq ~wkc}ha~ laoe~ df

naffbwbc~ kvblbco~e}, r}rkllq ahplbhbc~bn k} plkcb olk}} dw

plk}~am nbvamb} ac ~eb dp~amkl pk~e eame kwb nqbn ac ~eb hk}}

dw ekvb ac~bwfbwbcmb mdk~aco}# Dp~amkl fal~bw} }blbm~avblq

~wkc}ha~ laoe~ ac k pkw~amrlkw wkcob df kvblbco~e}, a#b# mdldrw},

ealb gldmiaco ~eb wbhkacaco# êbq mkc r}rkllq pk}} ldco

kvblbco~e} dclq, }edw~ kvblbco~e} dclq dw k gkcn df

kvblbco~e}, gldmiaco gd~e ldcobw kcn }edw~bw kvblbco~e}#

Dp~amkl fal~bw} kwb mdhhdclq r}bn ac ped~dowkpeq, ac hkcq

dp~amkl ac}~wrhbc~}, k}~wdcdhq kcn fdw mdldrw }~kob laoe~aco#

êbwb kwb ~d gwdkn mlk}}b} df fal~bw}:

;# Faubn fal~bw}7# ^rckglb fal~bw}#

;# Faubn fal~bw}: êbq klld k faubn, pwbnb~bwhacbnkvblbco~e ~d pk}} ~ewdroe#

7# ^rckglb fal~bw}: êbq nqckhamkllq ~rcb ~eb}blbm~bn lbco~e# ]acmb ^rckglb fal~bw} wb{rawb }dhb

bu~bwckl pdbw, ~ebq kwb cd~ pk}}avb gr~ km~avbmdhpdcbc~}#

K# ^qpb} df Faubn fal~bw}:a! êac(falh ac~bwfbwbcmb fal~bw:êa} fal~bw nbpbcn} dc ~eb bffbm~ df ac~bwfbwbcmb khdco

hkcq laoe~ kvb} wbflbm~bn fwdh ~eb }ebkf df ~eac lkqbw}#

Af ~eb ~eamicb}} df bkme lkqbw a} b{rkl ~d $>, ~ebc ~eb

laoe~ k~ kvblbco~e bupbwabcmb} k pek}b }eaf~ b{rkl ~d #

aa! Mkva~q fal~bw}:êb}b fal~bw} kwb gk}bn dc ~eb Fkgwq(Pbwd~ %FP! wb}dck~dw

kl}d mkllbn ~eb Fkgwq(Pbwd~ ac~bwfbwdhb~bw# Kc FP

}rppdw~} dclq ~ed}b kvblbco~e} ~ek~ mdhplb~b ~ebaw ~d~kl

pk~e a~eac ~eb mkva~q a~e k zbwd pek}b }eaf~#

aaa! Hrl~amkva~q fal~bw} kcn nablbm~wam ~eac(falh

hrl~amkva~q fal~bw}%N^HF!:êb}b fal~bw} mk}mknb }bvbwkl

FP mkva~ab}, k fbk~ ~ek~ hkib} ~eb ~wkc}ha}}adc

mekwkm~bwa}~am mld}b ~d ~eb anbkl dcb# K N^HF a} k nbvamb

mdc}~wrm~bn fwdh }bvbwkl FP mkva~ab}, ebwb wbflbm~adc a}

pwdvanbn gq hrl~alkqbw ~eac(falh hawwdw}# A~ r~alazb} kll

~eb knvkc~kob} df hrl~alkqbw ~eac(falh hawwdw} kcn ~eb

hrl~amkva~q mk}mknb ~d dg~kac k flk~ kcn }~bbp

~wkc}ha}}adc mekwkm~bwa}~am#

G# ^qpb} df ^rckglb fal~bw}:a! Naffwkm~adc owk~aco:êb ~rcaco mkpkgala~q df naffwkm~adc owk~aco a} nb~bwhacbn

gq ~eb fdwhrlk, ;=#75: n}ac8h# êb hd}~ pwkm~amkl

kq ~d mekcob a~ a} ~d vkwq kcolb , ~ek~ a} ,~d ~al~ ~eb

naffwkm~adc owk~aco#

aa!Nablbm~wam ~eac(falh hrl~amkva~q fal~bw:_b mkc ~rcb N^HF gq ~a~laco ~eb fal~bw a~e wb}pbm~ ~d

pwdpkok~aco laoe~# Kcd~ebw pd}}agala~q a} ~d }lanb ~eb

~wakcorlkw }ekpb fal~bw lk~bwkllq# Ac ba~ebw mk}b, kcolb df

acmanbc~ mekcob}, eame wb}rl~} ac k mekcob ac ~eb $>

mdcna~adc ac ~eb fal~bw#

aaa!Fagbw Gwkoo owk~aco:_b mkc ~rcb ~ea} fal~bw gq r}aco ~eb fdwhrlk 7c bff8G#

_b mkc mekcob gq ba~ebw kpplqaco k }~wb~meaco fdwmb

dw ebk~aco ~eb owk~aco# Ld ld}}, bk}q mdrplaco, k ckwwd


2/8

gkcnan~e, kcn eaoe wb}dlr~adc kwb ~eb knvkc~kob} df

FGO ~rcaco fal~bw# A~} hkjdw nwkgkmi a} ckwwd nqckham

wkcob#

av!Kmdr}~d(dp~am ~rckglb fal~bw%KD^F!:êa} a} k vbwq ac~bwb}~aco fal~bw# A~ a} gk}bn lkwoblq dc

lkwoblq dc k Gwkoo owk~aco gr~ ~ea} owk~aco a} mwbk~bn gqkc kmdr}~am kvb# êa} hkib} ~eb nbvamb vbw}k~alb# êa}

fal~bw mdcvbw~} k ^B blbm~wdhkocb~am kvb ac~d k ^H

kvb kcn vamb vbw}k# ^B kcn ^H kwb ~wkc}vbw}b blbm~wam

kcn ~wkc}vbw}b hkocb~am kvb} wb}pbm~avblq#

v!Blbm~wd(dp~am ~rckglb fal~bw%BD^F!:êb }~wrm~rwb kcn ~eb pwacmaplb df dpbwk~adc df ~ea} fal~bw

kwb }ahalkw ~d KD^F# êb owk~aco a} mwbk~bn gq kc

blbm~wd(dp~am bffbm~ ac ~eb LaCgD= hk~bwakl# Facobw laib

blbm~wdnb} kwb r}bn ~d acnrmb ~ea} owk~aco#

va!Hkme( Zbecnbw ~rcaco fal~bw:^d hkib k ~rckglb HZF, k }qhhb~wam mdcfaorwk~adc df k

H(Zbecnbw ac~bwfbwdhb~bw a} r}bn# ^rcaco a} dg~kacbn gq

mekcoaco ~eb wbfwkm~avb acnbu df dcb df ~eb kwh}# êa}

fal~bw mkc gb fkgwamk~bn gq k la~edowkpeam hb~edn#

Fao ;%k,g,m! : FGO dp~amkl fagbw

]acmb ~eb k}}aochbc~ a} hkaclq dc Fagbw Gwkoo Owk~aco

dp~amkl fal~bw} kcn Fbgwq(Pbwd~ dp~amkl fal~bw}, }d ~eb}b ~d

fal~bw} ekvb gbbc na}mr}}bn ac nb~kal}#

AA# FAGBW GWKOO OWKÂCO FAL^BW]: K Fagbw(Gwkoo owk~aco%FGO! a} k ~qpb dfna}~wagr~bn Gwkoo wbflbm~dw

mdc}~wrm~bn ac k }edw~ }bohbc~ df dp~amkl fagbw ~ek~ wbflbm~}

pkw~amrlkw kvblbco~e} df laoe~ kcn ~wkc}ha~} kll d~ebw}# êa} a}

kmeabvbn gq mwbk~aco k pbwadnam vkwak~adc ac ~eb wbfwkm~avb

acnbu df ~eb fagbw mdwb, eame obcbwk~b} k kvblbco~e }pbmafam

nablbm~wam hawwdw# K fagbw Gwkoo owk~aco mkc ~ebwbfdwb gb r}bn

k} kc aclacb dp~amkl fal~bw ~d gldmi mbw~kac kvblbco~e}, dw k} k

kvblbco~e(}pbmafam wbflbm~dw#

êb faw}~ FGO k} nbhdc}~wk~bn gq Ibc Eall ac ;1?5#

Aca~akllq ~eb owk~aco} bwb fkgwamk~bn r}aco k va}aglb lk}bw

pwdpkok~aco kldco ~eb fagbw mdwb# Ac ~eb qbkw ;151, Obwkln

Hbl~z nbhdc}~wk~bn ~eb hrme hdwb flbuaglb ~wkc}vbw}b

edldowkpeam ac}mwap~adc ~bmeca{rb ebwb ~eb lk}bw allrhack~adc

mkhb fwdh ~eb }anb df ~eb fagbw#

K# Hkcrfkm~rwb: FGO} bwb mwbk~bn gq 'ac}mwagaco' dw

'wa~aco' }q}~bhk~am vkwak~adc df wbfwkm~avb acnbu ac~d ~eb mdwb

df k }pbmakl ~qpb df dp~amkl fagbw r}aco kc ac~bc}b rl~wkvadlb~

%RV! }drwmb }rme k} k RV lk}bw# ^d hkac pwdmb}}b} kwb r}bn:

ac~bwfbwbcmb kcn hk}iaco# êb hb~edn ~ek~ a} r}bn khdco ~eb

~d nbpbcn} dc ~eb ~qpb df owk~aco ~d gb hkcrfkm~rwbn#

Cdwhkllq k obwhkcarh(ndpbn }alamk fagbw a} r}bn ac ~eb

hkcrfkm~rwb df Fagbw Gwkoo owk~aco}# êb obwhkcarh(ndpbn

fagbw a} ped~d}bc}a~avb, eame hbkc} ~ek~ ~eb wbfwkm~avb acnbu

df ~eb mdwb mekcob} a~e bupd}rwb ~d RV laoe~# ]~kcnkwn fagbw}

mkc gb r}bn af ~eb ped~d}bc}a~ava~q a} bcekcmbn gq pwb(}dkiaco

~eb fagbw ac eqnwdobc#

G#Wbflbm~adc kcn ~wkc}ha}}adc df laoe~ gq FGO:
http://en.wikipedia.org/wiki/Distributed_Bragg_reflectorhttp://en.wikipedia.org/wiki/Optical_fiberhttp://en.wikipedia.org/wiki/Wavelengthhttp://en.wikipedia.org/wiki/Refractive_indexhttp://en.wikipedia.org/wiki/Refractive_indexhttp://en.wikipedia.org/wiki/Dielectric_mirrorhttp://en.wikipedia.org/wiki/Optical_filterhttp://en.wikipedia.org/wiki/Ultraviolethttp://en.wikipedia.org/wiki/Laserhttp://en.wikipedia.org/wiki/Germaniumhttp://en.wikipedia.org/wiki/Photosensitivityhttp://en.wikipedia.org/wiki/Photosensitivityhttp://en.wikipedia.org/wiki/Germaniumhttp://en.wikipedia.org/wiki/Laserhttp://en.wikipedia.org/wiki/Ultraviolethttp://en.wikipedia.org/wiki/Optical_filterhttp://en.wikipedia.org/wiki/Dielectric_mirrorhttp://en.wikipedia.org/wiki/Refractive_indexhttp://en.wikipedia.org/wiki/Refractive_indexhttp://en.wikipedia.org/wiki/Wavelengthhttp://en.wikipedia.org/wiki/Optical_fiberhttp://en.wikipedia.org/wiki/Distributed_Bragg_reflector


3/8

Fao 7: ]mebhk~am nakowkh df k Fagbw Gwkoo Owk~aco

K} }edc ac fao %7!, ~eb wbfwkm~avb acnbu df ~eb fagbw mdwb a}

hdnrlk~bn a~e k pbwadn df# _ebc k laoe~ df gwdkn }pbm~wrh

a} kpplabn ac dcb bcn df fagbw mdc~kacaco k Fagbw Gwkoo owk~aco,

~eb pkw~ df ~eb laoe~ a~e kvblbco~e hk~meaco ~eb Gwkoo

owk~aco kvblbco~e all gb wbflbm~bn gkmi ~d ~eb acpr~ bcn a~e

~eb wb}~ df ~eb laoe~ pk}}aco ~ewdroe ~eb d~ebw bcn# êa}

pebcdhbcdc a} }edc ac ~eb fao %=!:

Fao =: _dwiaco d FGO

Fwdh ~eb hdhbc~rh mdc}bwvk~adc wb{rawbhbc~ df ~eb

Gwkoo owk~aco mdcna~adc, ~eb fdlldaco b{rk~adc a} dg~kacbn:

ebwb cbff a} ~eb bffbm~avb wbfwkm~avb acnbu df ~eb fagbw mdwb,

kcn G a} ~eb kvblbco~e df ~eb laoe~ wbflbm~bn gq ~eb Gwkoo

owk~aco# êbwbfdwb, ~eb Gwkoo owk~aco kvblbco~e G mkc gb

bupwb}}bn k}

Fagbw Gwkoo owk~aco mkc gb r}bn k} k HRU$NBHRU nbvamb ac

_NH }q}~bh} fdw bu~wkm~aco k }aockl a~e k pkw~amrlkw

kvblbco~e fwdh k }~wbkh df }aockl} dw mekccbl}# A~ a}

buplkacbn ac ~eb fdlldaco fao%!

Fao >: FGO k} HRU$NBHRU

M# Fagbw Gwkoo Owk~aco }~wrm~rwb:

êb }~wrm~rwb df ~eb FGO mkc vkwq a~e ~eb wbfwkm~avb acnbu

dw ~eb owk~aco pbwadn# êb owk~aco pbwadn mkc gb rcafdwh dw

owknbn kcn ldmkla}bn dw na}~wagr~bn ac k }rpbw}~wrm~rwb#

êbwb kwb }au }~wrm~rwb} df FGO:

;# Rcafdwh pd}a~avb(dclq acnbu mekcob7# Okr}}akc kpdnazbn=# Wka}bn(md}acb kpdnazbn># Meawpbn2# Na}mwb~b pek}b }eaf~


4/8

6# ]rpbw}~wrm~rwb

Fao 2: ]~wrm~rwb df ~eb Wbfwkm~avb Acnbu Mekcob ac k Rcafdwh Fagbw Gwkoo

Owk~aco

Fao 6:Wbfwkm~avb Acnbu Pwdfalb ac ~eb Mdwb

Kpdnazbn owk~aco}: êbwb kwb gk}amkllq ~d {rkc~a~ab} ~ek~

mdc~wdl ~eb pwdpbw~ab} df ~eb FGO# êb}b kwb ~eb owk~aco

lbco~e, , oavbc k}

kcn ~eb owk~aco }~wbco~e, #êbwb kwb, edbvbw, ~ewbb

pwdpbw~ab} ~ek~ cbbn ~d gb mdc~wdllbn ac k FGO# êb}b kwb ~eb

wbflbm~ava~q, ~eb gkcnan~e, kcn ~eb }anb(ldgb }~wbco~e# Ac ~eb

}~wdco owk~aco laha~ %a#b#, fdw lkwob ! ~eb gkcnan~e

nbpbcn} dc ~eb owk~aco }~wbco~e, kcn cd~ ~eb owk~aco lbco~e#

êa} hbkc} ~eb owk~aco }~wbco~e mkc gb r}bn ~d }b~ ~eb

gkcnan~e# eb owk~aco lbco~e, bffbm~avblq , mkc ~ebc gb r}bn

~d }b~ ~eb pbki wbflbm~ava~q, eame nbpbcn} dc gd~e ~eb owk~aco

}~wbco~e kcn ~eb owk~aco lbco~e# êb wb}rl~ df ~ea} a} ~ek~ ~eb

}anb(ldgb }~wbco~e mkccd~ gb mdc~wdllbn, kcn ~ea} }ahplb

dp~ahazk~adc wb}rl~} ac }aocafamkc~ }anb(ldgb}# K ~eawn {rkc~a~q

mkc gb vkwabn ~d eblp a~e }anb(ldgb }rppwb}}adc# êa} a}

kpdnazk~adc df ~eb wbfwkm~avb acnbu mekcob# êb ~bwh

kpdnazk~adc wbfbw} ~d ~eb owknaco df ~eb wbfwkm~avb acnbu ~d

kppwdkme zbwd k~ ~eb bcn df ~eb owk~aco# Kpdnazbn owk~aco}

dffbw }aocafamkc~ ahpwdvbhbc~ ac }anb(ldgb }rppwb}}adc ealb

hkac~kacaco wbflbm~ava~q kcn k ckwwd gkcnan~e# êb ~d

frcm~adc} ~qpamkllq r}bn ~d kpdnazb k FGO kwb Okr}}akc kcn

wka}bn(md}acb#

Meawpbn fagbw Gwkoo owk~aco}:êb wbfwkm~avb acnbu pwdfalb df

~eb owk~aco hkq gb hdnafabn ~d knn d~ebw fbk~rwb}, }rme k} k

lacbkw vkwak~adc ac ~eb owk~aco pbwadn, mkllbn k meawp# êb

wbflbm~bn kvblbco~e mekcob} a~e ~eb owk~aco pbwadn,

gwdknbcaco ~eb wbflbm~bn }pbm~wrh# K owk~aco pd}}b}}aco k

meawp ek} ~eb pwdpbw~q df knnaco na}pbw}adcnaffbwbc~

kvblbco~e} wbflbm~bn fwdh ~eb owk~aco all gb }rgjbm~ ~d

naffbwbc~ nblkq}# êa} pwdpbw~q ek} gbbc r}bn ac ~eb

nbvbldphbc~ df pek}bn(kwwkq kc~bcck }q}~bh} kcn

pdlkwazk~adc hdnb na}pbw}adc mdhpbc}k~adc

âl~bn fagbw Gwkoo owk~aco}:Ac }~kcnkwn FGO}, ~eb owknaco dw

vkwak~adc df ~eb wbfwkm~avb acnbu a} kldco ~eb lbco~e df ~eb fagbw
http://en.wikipedia.org/wiki/Apodizationhttp://en.wikipedia.org/wiki/Chirphttp://en.wikipedia.org/wiki/Dispersion_(optics)http://en.wikipedia.org/wiki/Phased-arrayhttp://en.wikipedia.org/wiki/Phased-arrayhttp://en.wikipedia.org/wiki/Dispersion_(optics)http://en.wikipedia.org/wiki/Chirphttp://en.wikipedia.org/wiki/Apodization


5/8

, kcn a} ~qpamkllq rcafdwh kmwd}} ~eb an~e df ~eb fagbw# Ac k

~al~bn FGO %^FGO!, ~eb vkwak~adc df ~eb wbfwkm~avb acnbu a} k~

kc kcolb ~d ~eb dp~amkl kua}# êb kcolb df ~al~ ac k ^FGO ek} kc

bffbm~ dc ~eb wbflbm~bn kvblbco~e, kcn gkcnan~e#Ldco(pbwadn owk~aco}:

^qpamkllq ~eb owk~aco pbwadn a} ~eb }khb }azb k} ~eb Gwkoo

kvblbco~e, k} }edc kgdvb# Fdw k owk~aco ~ek~ wbflbm~} k~

;,200 ch, ~eb owk~aco pbwadn a} 200 ch, r}aco k wbfwkm~avb

acnbu df ;#2# Ldcobw pbwadn} mkc gb r}bn ~d kmeabvb hrme

gwdknbw wb}pdc}b} ~ekc kwb pd}}aglb a~e k }~kcnkwn FGO#

êb}b owk~aco} kwb mkllbn ldco(pbwadn fagbw owk~aco# êbq

~qpamkllq ekvb owk~aco pbwadn} dc ~eb dwnbw df ;00 hamwdhb~bw},

~d k hallahb~bw, kcn kwb ~ebwbfdwb hrme bk}abw ~d hkcrfkm~rwb#

N#Kpplamk~adc}:

a! Mdhhrcamk~adc}: êb pwahkwq kpplamk~adc df fagbw

Gwkoo owk~aco} a} ac dp~amkl mdhhrcamk~adc} }q}~bh}# êbq

kwb }pbmafamkllq r}bn k} cd~me fal~bw}# êbq kwb kl}d r}bn ac

dp~amkl hrl~aplbubw} kcn nbhrl~aplbubw} a~e kc dp~amkl

mawmrlk~dw, dw Ydp~amkl knn(nwdp hrl~aplbubwXX %DKNH!# Faorwb

%?! }ed} > mekccbl}, nbpam~bn k} > mdldrw}, ahpacoaco dc~d kFGO vak kc dp~amkl mawmrlk~dw# êb FGO a} }b~ ~d wbflbm~ dcb df

~eb mekccbl}, ebwb mekccbl ># êb }aockl a} wbflbm~bn gkmi ~d

~eb mawmrlk~dw ebwb a~ a} nawbm~bn ndc kcn nwdppbn dr~ df ~eb

}q}~bh# ]acmb ~eb mekccbl ek} gbbc nwdppbn, kcd~ebw }aockl dc

~ek~ mekccbl mkc gb knnbn k~ ~eb }khb pdac~ ac ~eb cb~dwi# K

nbhrl~aplbubw mkc gb kmeabvbn gq mk}mknaco hrl~aplb nwdp

}bm~adc} df ~eb DKNH, ebwb bkme nwdp blbhbc~ r}b} kc FGO

}b~ ~d ~eb kvblbco~e ~d gb hrl~aplbubn# Mdcvbw}blq, k

hrl~aplbubw mkc gb kmeabvbn gq mk}mknaco hrl~aplb knn

}bm~adc} df ~eb DKNH# FGO nbhrl~aplbubw} kcn DKNH} mkc

kl}d gb ~rckglb#

Fao ?:Dp~amkl knn(nwdp hrl~aplbubw

aa!Fagbw Gwkoo owk~aco }bc}dw}:Fagbw Gwkoo owk~aco} mkc ~ebc

gb r}bn k} nawbm~ }bc}aco blbhbc~} fdw }~wkac kcn ~bhpbwk~rwb#

êbq mkc kl}d gb r}bn k} ~wkc}nrm~adc blbhbc~}, mdcvbw~aco

~eb dr~pr~ df kcd~ebw }bc}dw, eame obcbwk~b} k }~wkac dw

~bhpbwk~rwb mekcob fwdh ~eb hbk}rwkcn, fdw bukhplb, fagbw

Gwkoo owk~aco ok} }bc}dw} r}b kc kg}dwgbc~ mdk~aco, eame ac

~eb pwb}bcmb df k ok} bupkcn} obcbwk~aco k }~wkac, eame a}

hbk}rwkglb gq ~eb owk~aco# ^bmecamkllq, ~eb kg}dwgbc~ hk~bwakl

a} ~eb }bc}aco blbhbc~, mdcvbw~aco ~eb khdrc~ df ok} ~d k

}~wkac# êb Gwkoo owk~aco ~ebc ~wkc}nrmb} ~eb }~wkac ~d ~eb

mekcob ac kvblbco~e# ]pbmafamkllq, fagbw Gwkoo owk~aco} kwb

facnaco r}b} ac ac}~wrhbc~k~adc kpplamk~adc} }rme k}

}ba}hdldoq, pwb}}rwb }bc}dw} fdw bu~wbhblq ekw}e

bcvawdchbc~}, kcn k} ndcedlb }bc}dw} ac dal kcn ok} bll}

fdw hbk}rwbhbc~ df ~eb bffbm~} df bu~bwckl pwb}}rwb,

~bhpbwk~rwb, }ba}ham vagwk~adc} kcn aclacb fld hbk}rwbhbc~#

AAA#FKGWQ(PBWD^ FAL^BW]:

êb Fkgwq(Pbwd~ fal~bw a} kc dp~amkl wb}dck~dw ~ek~ mdcfacb} kcn

}~dwb} ~eb laoe~ bcbwoq k~ }blbm~bn fwb{rbcmab}# êa} dp~amkl

~wkc}ha}}adc }q}~bh acmdwpdwk~b} fbbngkmi, ebwbgq laoe~ a}

wbpbk~bnlq wbflbm~bn a~eac ~eb }q}~bh kcn ~er} mawmrlk~b}

a~edr~ b}mkpaco ~eb }q}~bh# K }ahplb Fkgwq(Pbwd~ fal~bw

mdhpwa}b} df ~d pkwkllbl plkckw hawwdw} }pkmbn k faubn

na}~kcmb kpkw~# êb wkq} ~wkvbllaco gb~bbc hawwdw} kwb ibp~

pbwpbcnamrlkw ~d ~eb plkcb df ~eb hawwdw} vak k ~d(lbc}

}q}~bh#
http://en.wikipedia.org/wiki/Fiber_Bragg_grating#Theoryhttp://en.wikipedia.org/wiki/Long-period_fiber_gratinghttp://en.wikipedia.org/wiki/Notch_filterhttp://en.wikipedia.org/wiki/Multiplexershttp://en.wikipedia.org/wiki/Demultiplexerhttp://en.wikipedia.org/wiki/Optical_circulatorhttp://en.wikipedia.org/wiki/Optical_circulatorhttp://en.wikipedia.org/wiki/Seismologyhttp://en.wikipedia.org/wiki/Seismologyhttp://en.wikipedia.org/wiki/Pressure_sensorhttp://en.wikipedia.org/w/index.php?title=Downhole_sensor&action=edit&redlink=1http://en.wikipedia.org/w/index.php?title=Downhole_sensor&action=edit&redlink=1http://en.wikipedia.org/wiki/Pressure_sensorhttp://en.wikipedia.org/wiki/Seismologyhttp://en.wikipedia.org/wiki/Optical_circulatorhttp://en.wikipedia.org/wiki/Optical_circulatorhttp://en.wikipedia.org/wiki/Demultiplexerhttp://en.wikipedia.org/wiki/Multiplexershttp://en.wikipedia.org/wiki/Notch_filterhttp://en.wikipedia.org/wiki/Long-period_fiber_gratinghttp://en.wikipedia.org/wiki/Fiber_Bragg_grating#Theory


6/8

Fao 5: Fkgwq(Pbwd~ fal~bw

êb Fkgwq(Pbwd~ k} na}mdvbwbn gq Mekwlb} Fkgwq kcn

Klfwbn Pbwd~ k~ ~eb Rcavbw}a~q df Hkw}ballb ac ;51?# êb

na}mdvbwq k} k wb}rl~ fwdh dwi pwahkwalq mdcnrm~bn ac ~eb

fabln df blbm~wama~q kcn ~eb cbmb}}a~q ac ~ea} fabln fdw pwbma}b

hbk}rwbhbc~} df }hkll na}~kcmb}# _a~e ~ea} }~rnq, Fkgwq kcn

Pbwd~ na}mdvbwbn kc dp~amkl pebcdhbcdc mkllbn wb}dckcmb ~ek~

lbn ~d ~eb acvbc~adc df k vbwq r}bfrl hb~edn df hbk}rwaco

}hkll na}~kcmb}#

K# _dwiaco df Fkgwq(Pbwd~ fal~bwêb vkwqaco ~wkc}ha}}adc frcm~adc df Fkgwq(Pbwd~ a} mkr}bn gq

ac~bwfbwbcmb gb~bbc ~eb hrl~aplb wbflbm~adc} df laoe~ gb~bbc

~eb ~d wbflbm~aco }rwfkmb}# Mdc}~wrm~avb ac~bwfbwbcmb dmmrw} af

~eb ~wkc}ha~~bn gbkh} kwb ac pek}b, kcn ~ea} mdwwb}pdcn} ~d k

eaoe(~wkc}ha}}adc pbki df ~eb fal~bw# Af ~eb ~wkc}ha~~bn gbkh}

kwb dr~(dfpek}b, nb}~wrm~avb ac~bwfbwbcmb dmmrw} kcn ~ea}

mdwwb}pdcn} ~d k ~wkc}ha}}adc hacahrh# _eb~ebw ~eb hrl~aplq

wbflbm~bn gbkh} kwb ac pek}b dw cd~ nbpbcn} dc ~eb kvblbco~e

%! df ~eb laoe~ %ac vkmrrh!, ~eb kcolb ~eb laoe~ ~wkvbl} ~ewdroe

~eb fal~bw %!, ~eb ~eamicb}} df ~eb fal~bw %! kcn ~eb wbfwkm~avb

acnbu df ~eb hk~bwakl gb~bbc ~eb wbflbm~aco }rwfkmb} %c!#êb

pek}b naffbwbcmb gb~bbc bkme }rmmbbnaco wbflbm~adc a} oavbc

gq :

Af gd~e }rwfkmb} ekvb k wbflbm~kcmbW, ~eb ~wkc}ha~~kcmb

frcm~adc df ~eb b~kldc a} oavbc gq

ebwb

a} ~eb mdbffamabc~ df facb}}b#

Hkuahrh ~wkc}ha}}adc dmmrw} ebc ~eb dp~amkl pk~e lbco~e

naffbwbcmb %7clmd}! gb~bbc bkme ~wkc}ha~~bn gbkh a} kc

ac~bobw hrl~aplb df ~eb kvblbco~e# Ac ~eb kg}bcmb df

kg}dwp~adc, ~eb wbflbm~kcmb df ~eb fal~bw Wb a} ~eb mdhplbhbc~

df ~eb ~wkc}ha~~kcmb, }rme ~ek~ ^b )Wb 8;# êb hkuahrh

wbflbm~ava~q a} oavbc gq,

kcn ~ea} dmmrw} ebc ~eb pk~e(lbco~e naffbwbcmb a} b{rkl ~d

eklf kc dnn hrl~aplb df ~eb kvblbco~e#

Fao 1:K FkgwqPbwd~ fal~bw# Laoe~ bc~bw} ~eb b~kldc kcn rcnbwodb} hrl~aplb

ac~bwckl wbflbm~adc}#
http://en.wikipedia.org/wiki/Refractive_indexhttp://en.wikipedia.org/wiki/Refractive_indexhttp://en.wikipedia.org/wiki/Reflectancehttp://en.wikipedia.org/wiki/Transmission_coefficienthttp://en.wikipedia.org/wiki/Transmission_coefficienthttp://en.wikipedia.org/wiki/File:Etalon-2.svghttp://en.wikipedia.org/wiki/File:Etalon-2.svghttp://en.wikipedia.org/wiki/Transmission_coefficienthttp://en.wikipedia.org/wiki/Transmission_coefficienthttp://en.wikipedia.org/wiki/Reflectancehttp://en.wikipedia.org/wiki/Refractive_indexhttp://en.wikipedia.org/wiki/Refractive_index


7/8

Fao ;0: eb ~wkc}ha}}adc df kc b~kldc k} k frcm~adc df kvblbco~e# K eaoe(

facb}}b fal~bw %wbn lacb! }ed} }ekwpbw pbki} kcn ldbw ~wkc}ha}}adc hacahk

~ekc k ld(facb}}b fal~bw %glrb!#

G# Kpplamk~adc};# êb hd}~ ahpdw~kc~ mdhhdc kpplamk~adc} kwb k}

namewdam fal~bw}, ac eame k }bwab} df k~kldcam lkqbw}

kwb nbpd}a~bn dc kc dp~amkl }rwfkmb gq vkpdrw

nbpd}a~adc# êb}b dp~amkl fal~bw} r}rkllq ekvb hdwb

bukm~ wbflbm~avb kcn pk}} gkcn} ~ekc kg}dwp~avb

fal~bw}# _ebc pwdpbwlq nb}aocbn, ~ebq wrc mddlbw ~ekc

kg}dwp~avb fal~bw} gbmkr}b ~ebq mkc wbflbm~ rckc~bn

kvblbco~e}# Namewdam fal~bw} kwb anblq r}bn acdp~amkl b{raphbc~ }rme k} laoe~ }drwmb}, mkhbwk} kcn

k}~wdcdhamkl b{raphbc~#

7# ^blbmdhhrcamk~adc} cb~dwi} bhpldqacokvblbco~e nava}adc hrl~aplbuaco ekvb knn(nwdp

hrl~aplbubw} a~e gkci} df hacak~rwb ~rcbn fr}bn

}alamk dw nakhdcn b~kldc}# êb}b kwb }hkll awanb}mbc~

mrgb} kgdr~ 7 hh dc k }anb, hdrc~bn ac }hkll eaoe(

pwbma}adc wkmi}# êb hk~bwakl} kwb med}bc ~d hkac~kac

}~kglb hawwdw(~d(hawwdw na}~kcmb}, kcn ~d ibbp }~kglb

fwb{rbcmab} bvbc ebc ~eb ~bhpbwk~rwb vkwab}#

=# Kc dp~amkl kvbhb~bw a} k mdhgack~adc df rp ~d favbFkgwqPbwd~ ac~bwfbwdhb~bw} a~e k fkm~dw df ~bc

naffbwbcmb} ac gb~bbc kcq ~d df ~ebh# êb

gbkh a} hknb navbwobc~ gq k mqlacnwamkl lbc} kcn ~eb

na}~kcmb gb~bbc ~d gwaoe~ lacb} a} wbmdwnbn gq

hbkc} df k MMN mkhbwk#

># Lk}bw wb}dck~dw} kwb df~bc nb}mwagbn k} FkgwqPbwd~wb}dck~dw}, kl~edroe fdw hkcq ~qpb} df lk}bw ~eb

wbflbm~ava~q df dcb hawwdw a} mld}b ~d ;00", hkiaco a~

hdwb }ahalkw ~d k Oawb} drwcda} ac~bwfbwdhb~bw#

]bhamdcnrm~dw nadnb lk}bw} }dhb~ahb} r}b k ~wrb

FkgwqPbwd~ obdhb~wq, nrb ~d ~eb naffamrl~q df

mdk~aco ~eb bcn fkmb~} df ~eb meap#

2# FkgwqPbwd~ fal~bw} mkc gb r}bn ~d pwdldco ~ebac~bwkm~adc lbco~e ac lk}bw kg}dwp~adc }pbm~wdhb~wq

~bmeca{rb}#

6# K FkgwqPbwd~ fal~bw mkc gb r}bn ~d hkib k}pbm~wdhb~bw mkpkglb df dg}bwvaco ~eb ZbbhkcBffbm~, ebwb ~eb }pbm~wkl lacb} kwb fkw ~dd mld}b

~dob~ebw ~d na}~acora}e a~e k cdwhkl }pbm~wdhb~bw#

?# Ac k}~wdcdhq kc b~kldc a} r}bn ~d }blbm~ k }acolbk~dham ~wkc}a~adc fdw ahkoaco# êb hd}~ mdhhdc a}

~eb E(klpek lacb df ~eb }rc#

MDCMLR]ADC

]d, b ekvb }bbc ~ek~ Dp~amkl fal~bw} kwb nbvamb} ~ek~}blbm~avblq ~wkc}ha~ laoe~ df naffbwbc~ kvblbco~e}, r}rkllq

ahplbhbc~bn k} plkcb olk}} dw plk}~am nbvamb} ac ~eb dp~amkl

pk~e eame kwb ba~ebw nqbn ac ~eb hk}} dw ekvb ac~bwfbwbcmb

mdk~aco}# êb}b kwb obcbwkllq r}bn ac ped~dowkpeq, }~kob

laoe~caco, k}~wdcdhq, b~m# ac fr~rwb ~ebwb all gb hdwb

nbvbldphbc~ ac ~ea} fabln kcn b }ekll }bb hrme hdwb

kpplamk~adc} ac ~eb r}b df dp~amkl fal~bw}#

KMICD_LBNOBHBC^

A drln laib ~d ~ekci drw hkh, H}# ]rgwk Hriebwjbb, fdw

oavaco hb ~ea} k}}aochbc~ k} a~ eblpbn hb k ld~ df ok~ebw

icdlbnob wbokwnaco ~eb dwiaco kcn ~eb r}b df dp~amkl fal~bw}

ac ~dnkq} dwln#
http://en.wikipedia.org/wiki/File:Etalon-2.pnghttp://en.wikipedia.org/w/index.php?title=Wavemeter&action=edit&redlink=1http://en.wikipedia.org/wiki/Light_beamhttp://en.wikipedia.org/wiki/Cylindrical_lenshttp://en.wikipedia.org/wiki/Charge-coupled_devicehttp://en.wikipedia.org/wiki/Optical_cavityhttp://en.wikipedia.org/wiki/Gires%E2%80%93Tournois_interferometerhttp://en.wikipedia.org/wiki/Gires%E2%80%93Tournois_interferometerhttp://en.wikipedia.org/wiki/Gires%E2%80%93Tournois_interferometerhttp://en.wikipedia.org/wiki/Diode_laserhttp://en.wikipedia.org/wiki/Laser_absorption_spectrometryhttp://en.wikipedia.org/wiki/Spectrometerhttp://en.wikipedia.org/wiki/Zeeman_effecthttp://en.wikipedia.org/wiki/Zeeman_effecthttp://en.wikipedia.org/wiki/Spectral_lineshttp://en.wikipedia.org/wiki/Astronomyhttp://en.wikipedia.org/w/index.php?title=Atomic_transition&action=edit&redlink=1http://en.wikipedia.org/wiki/H-alphahttp://en.wikipedia.org/wiki/Sunhttp://en.wikipedia.org/wiki/Optical_pathhttp://en.wikipedia.org/wiki/Optical_pathhttp://en.wikipedia.org/wiki/Interference_(optics)http://en.wikipedia.org/wiki/Interference_(optics)http://en.wikipedia.org/wiki/Optical_pathhttp://en.wikipedia.org/wiki/Optical_pathhttp://en.wikipedia.org/wiki/Sunhttp://en.wikipedia.org/wiki/H-alphahttp://en.wikipedia.org/w/index.php?title=Atomic_transition&action=edit&redlink=1http://en.wikipedia.org/wiki/Astronomyhttp://en.wikipedia.org/wiki/Spectral_lineshttp://en.wikipedia.org/wiki/Zeeman_effecthttp://en.wikipedia.org/wiki/Zeeman_effecthttp://en.wikipedia.org/wiki/Spectrometerhttp://en.wikipedia.org/wiki/Laser_absorption_spectrometryhttp://en.wikipedia.org/wiki/Diode_laserhttp://en.wikipedia.org/wiki/Gires%E2%80%93Tournois_interferometerhttp://en.wikipedia.org/wiki/Optical_cavityhttp://en.wikipedia.org/wiki/Charge-coupled_devicehttp://en.wikipedia.org/wiki/Cylindrical_lenshttp://en.wikipedia.org/wiki/Light_beamhttp://en.wikipedia.org/w/index.php?title=Wavemeter&action=edit&redlink=1http://en.wikipedia.org/wiki/File:Etalon-2.pnghttp://en.wikipedia.org/wiki/File:Etalon-2.png


8/8

WBFBWBCMB]

Y;X Wamkwnd Fbmbn, Hamekla} C# Zbwvk}, kcn Haorbl

K# Hrwabl, Kc Bffamabc~ Acvbw}b ]mk~~bwaco Klodwa~eh fdw ~eb

Nb}aoc df Cd rcafdwh Fagbw Gwkoo Owk~aco}#

Y7X ^rwkc Bwndokc, Fagbw Owk~aco ]pbm~wk

Y=X Jk}dc ]# Halcb, Knwakc J# Ibk~aco, Jdec H# Nbll, kcn Ldwbczd

Fkwkdcb, HBH](gk}bn ^rckglb Fkgwq(Pbwd~ Fal~bw} dc ]alamdc

]rg}~wk~b}, ]meddl df Blbm~wamkl, Blbm~wdcam kcn Mdhpr~bw

Bcoacbbwaco ^eb Rcavbw}a~q df _b}~bwc Kr}~wklak, Pbw~e, Kr}~wklak#

Y>X ]# Gdr~kha, G# Gbc Gkiaw, J#(L# Lbmlbwm{, U# Lb~kw~wb, P# Wdjd(

Wdhbd, H# Okwwaorb}, kcn P# Vai~dwdva~me, Eaoelq }blbm~avb kcn

mdhpkm~ ~rckglb HDBH] ped~dcam mwq}~kl Fkgwq(Pbwd~ fal~bw,

LBDH(MCW](Bmdlb Mbc~wklb nb Lqdc, =6 Kvbcrb Orq nb

Mdlldcorb, 61;=> Bmrllq Mbnbu, Fwkcmb#

Y2X Kcnwbk} D~edcd}, Fagbw Gwkoo owk~aco}, Nbpkw~hbc~ df

Ck~rwkl ]mabcmb}9 Peq}am}, Rcavbw}a~q df Mqpwr}, Camd}ak, Mqpwr}#

APPLICATIONS OF FIBER OPTICS FILTERS

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