Lecture - Wayne State...

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Lecture 5 FiberOptical, Integrated Optical, and MicroOptical Network Components Slide 1 Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5

Transcript of Lecture - Wayne State...

Page 1: Lecture - Wayne State Universityece.eng.wayne.edu/~avrutsky/Teaching/ECE5870/NotesFall08/Lectur… · Laser light usually has linear polarization: k r E r-plane electric field vector

Lecture 5Fiber‐Optical, Integrated Optical, and Micro‐Optical p , pNetwork Components

Slide 1Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5

Page 2: Lecture - Wayne State Universityece.eng.wayne.edu/~avrutsky/Teaching/ECE5870/NotesFall08/Lectur… · Laser light usually has linear polarization: k r E r-plane electric field vector

Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 2

Page 3: Lecture - Wayne State Universityece.eng.wayne.edu/~avrutsky/Teaching/ECE5870/NotesFall08/Lectur… · Laser light usually has linear polarization: k r E r-plane electric field vector

Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 3

Page 4: Lecture - Wayne State Universityece.eng.wayne.edu/~avrutsky/Teaching/ECE5870/NotesFall08/Lectur… · Laser light usually has linear polarization: k r E r-plane electric field vector

Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 4

Page 5: Lecture - Wayne State Universityece.eng.wayne.edu/~avrutsky/Teaching/ECE5870/NotesFall08/Lectur… · Laser light usually has linear polarization: k r E r-plane electric field vector

Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 5

Page 6: Lecture - Wayne State Universityece.eng.wayne.edu/~avrutsky/Teaching/ECE5870/NotesFall08/Lectur… · Laser light usually has linear polarization: k r E r-plane electric field vector

Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 6

Page 7: Lecture - Wayne State Universityece.eng.wayne.edu/~avrutsky/Teaching/ECE5870/NotesFall08/Lectur… · Laser light usually has linear polarization: k r E r-plane electric field vector

Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 7

Page 8: Lecture - Wayne State Universityece.eng.wayne.edu/~avrutsky/Teaching/ECE5870/NotesFall08/Lectur… · Laser light usually has linear polarization: k r E r-plane electric field vector

Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 8

Page 9: Lecture - Wayne State Universityece.eng.wayne.edu/~avrutsky/Teaching/ECE5870/NotesFall08/Lectur… · Laser light usually has linear polarization: k r E r-plane electric field vector

Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 9

Page 10: Lecture - Wayne State Universityece.eng.wayne.edu/~avrutsky/Teaching/ECE5870/NotesFall08/Lectur… · Laser light usually has linear polarization: k r E r-plane electric field vector

Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 10

Page 11: Lecture - Wayne State Universityece.eng.wayne.edu/~avrutsky/Teaching/ECE5870/NotesFall08/Lectur… · Laser light usually has linear polarization: k r E r-plane electric field vector

Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 11

Page 12: Lecture - Wayne State Universityece.eng.wayne.edu/~avrutsky/Teaching/ECE5870/NotesFall08/Lectur… · Laser light usually has linear polarization: k r E r-plane electric field vector

Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 12

Page 13: Lecture - Wayne State Universityece.eng.wayne.edu/~avrutsky/Teaching/ECE5870/NotesFall08/Lectur… · Laser light usually has linear polarization: k r E r-plane electric field vector

Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 13

Page 14: Lecture - Wayne State Universityece.eng.wayne.edu/~avrutsky/Teaching/ECE5870/NotesFall08/Lectur… · Laser light usually has linear polarization: k r E r-plane electric field vector

Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 14

Page 15: Lecture - Wayne State Universityece.eng.wayne.edu/~avrutsky/Teaching/ECE5870/NotesFall08/Lectur… · Laser light usually has linear polarization: k r E r-plane electric field vector

Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 15

Page 16: Lecture - Wayne State Universityece.eng.wayne.edu/~avrutsky/Teaching/ECE5870/NotesFall08/Lectur… · Laser light usually has linear polarization: k r E r-plane electric field vector

Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 16

Page 17: Lecture - Wayne State Universityece.eng.wayne.edu/~avrutsky/Teaching/ECE5870/NotesFall08/Lectur… · Laser light usually has linear polarization: k r E r-plane electric field vector

Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 17

Page 18: Lecture - Wayne State Universityece.eng.wayne.edu/~avrutsky/Teaching/ECE5870/NotesFall08/Lectur… · Laser light usually has linear polarization: k r E r-plane electric field vector

Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 18

Page 19: Lecture - Wayne State Universityece.eng.wayne.edu/~avrutsky/Teaching/ECE5870/NotesFall08/Lectur… · Laser light usually has linear polarization: k r E r-plane electric field vector

Polarization of Light

In electro‐magnetic wave propagating in vacuum the vectors, and  are mutually th l

Er

orthogonal. 

Most of light sources produce nonpolarizedlight. The electric field vector randomlychanges its direction although it is always

kr

Hr

Er

changes its direction, although it is always normal to the propagation direction. 

Laser light usually has linear polarization: 

kr

Er

-plane

electric field vector oscillates in amplitude, but its direction is well determined.  k

r

Hr

-plane

Add two waves polarized in orthogonal directions (x and y) with π/2 phase shift between them and you get a circularly polarized light. y

xerx

yer z

Er

If x and y component are not identical in amplitude and/or phase shift between them is not exactly π/2, the polarization is elliptical.

ψ

x

y

Er

maxEminE

Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 19

E

Page 20: Lecture - Wayne State Universityece.eng.wayne.edu/~avrutsky/Teaching/ECE5870/NotesFall08/Lectur… · Laser light usually has linear polarization: k r E r-plane electric field vector

Polarizer

Er Polarization of

transmitted light

Polarization ofabsorbed light

r

kr

kr

transmitted light

ψ

||E

⊥Er

Incident beam

k

Transmitted beaml i ipolarization polarization

The simplest device to control light polarization: polarizer.For linearly polarized input the transmitted intensity is proportional to Cos2 of the angle between the input polarization and the polarization plane if the polarizer

Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 20

polarization plane if the polarizer.

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Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 21

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Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 22

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Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 23

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Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 24

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Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 25

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Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 26

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Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 27

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Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 28

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Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 29

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Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 30

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Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 31

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Ivan Avrutsky, ECE 5870 Optical Communication Networks, Fall 2008, Lecture 5 Slide 32