Prof. Katsuaki Sato Research: COE for Future Nano Materials Education: Department of Applied Physics...

9
Prof. Katsuaki Sato Research: COE for Future Nano Materials Education: Department of Applied Physics Introduction to Optoelectronics 1st Lecture: Optoelectronics in your neighborhood raduate School of Engineering hort Term Education Program for Foreign Sudent

Transcript of Prof. Katsuaki Sato Research: COE for Future Nano Materials Education: Department of Applied Physics...

Page 1: Prof. Katsuaki Sato Research: COE for Future Nano Materials Education: Department of Applied Physics Introduction to Optoelectronics 1st Lecture: Optoelectronics.

Prof. Katsuaki SatoResearch: COE for Future Nano MaterialsEducation: Department of Applied Physics

Introduction to Optoelectronics1st Lecture: Optoelectronics in your neighborhood

Graduate School of EngineeringShort Term Education Program for Foreign Sudent

Page 2: Prof. Katsuaki Sato Research: COE for Future Nano Materials Education: Department of Applied Physics Introduction to Optoelectronics 1st Lecture: Optoelectronics.

What do you imagine when you hear the word “opto-electronics”?

• Opto-electronics is a word combining optics and electronics, mainly used in Japan.

• American people prefer to use a term “optronics” or “electro-optics”.

• This academic field covers broad concepts involving light emitting devices and elements, information displays, image pickup devices, optical storages, optical communications, remote sensing systems and so on.

Page 3: Prof. Katsuaki Sato Research: COE for Future Nano Materials Education: Department of Applied Physics Introduction to Optoelectronics 1st Lecture: Optoelectronics.

Why optical fiber can transmit light so far away?

• Structure of optical fiber

• What is the total reflection?

• How far can the fiber transmit light?

• What are physical reasons of light attenuation?– Long wavelength attenuation– Short wavelength attenuation– Optimum wavelenth

Page 4: Prof. Katsuaki Sato Research: COE for Future Nano Materials Education: Department of Applied Physics Introduction to Optoelectronics 1st Lecture: Optoelectronics.

Can you tell how many kinds of displays are found in the market?

Page 5: Prof. Katsuaki Sato Research: COE for Future Nano Materials Education: Department of Applied Physics Introduction to Optoelectronics 1st Lecture: Optoelectronics.

How many kinds of optical disks do you know?

• Read-only memory (ROM) type

• Direct read after write (DRAW) or Write-once type

• Rewritable (RW) or Random access memory (RAM) type

• CD, MD, MO, DVD, BD, HD-DVD

Page 6: Prof. Katsuaki Sato Research: COE for Future Nano Materials Education: Department of Applied Physics Introduction to Optoelectronics 1st Lecture: Optoelectronics.

Components of opto-electronics

• Light emitting diodes (LED)

• Laser diodes (LD)

• Why and how these diodes emit light?

• To answer the question we need to understand; – diodes– semiconductors– pn junctions

Solid state physics underlying these semiconductor devices is necessary

Page 7: Prof. Katsuaki Sato Research: COE for Future Nano Materials Education: Department of Applied Physics Introduction to Optoelectronics 1st Lecture: Optoelectronics.

Integrated optical circuit (IOC)

• integrated optical circuit (IOC) :A circuit, or group of interconnected circuits, consisting of miniature solid-state optical components on semiconductor or dielectric substrates. Note: IOC components include light sources, optical filters, photodetectors, and thin-film optical waveguides

http://www.atis.org/tg2k/_integrated_optical_circuit.html

Page 8: Prof. Katsuaki Sato Research: COE for Future Nano Materials Education: Department of Applied Physics Introduction to Optoelectronics 1st Lecture: Optoelectronics.

Optoelectric integrated circuit (OEIC)

• Technologies for integrating optoelectronic devices and electronic circuitry

• Classified as either hybrid or monolithic

• None of these technologies is fully developed, but limited hybrid integration is available commercially.

http://web.mit.edu/fonstad/optochip/opto.home.html

Page 9: Prof. Katsuaki Sato Research: COE for Future Nano Materials Education: Department of Applied Physics Introduction to Optoelectronics 1st Lecture: Optoelectronics.

Quiz

• Please answer briefly the following questions in the sheet distributed. This is to establish an optimal educational program for this class. The answer does not affect your final rating.

• Question 1 Can you tell a range of wavelength (in nm) of visible light?

• Question 2Laser is an abbreviation of a word string. Spell it out.

• Question 3 What is the difference between LED and LD?

• Question 4What is the difference between CD-R and CD-RW?

• Question 5Please explain how the light is transmitted through optical fiber.