ENGRI_111_13_photonics4 - ENGRI 111 1 Photodetectors 2...

Info icon This preview shows pages 1–14. Sign up to view the full content.

ENGRI 111 ENGRI 111 1. Photodetectors 2. Optical Fibers
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Photodetectors Photodetectors Photoconductive materials Light is used to excite charge carriers into higher energy states in an intrinsic semiconductor which can carry electrical current when voltage is applied Light sensitivity low slow e h ν Ev Ec
Image of page 2
Photodiodes Photodiodes oe magazine, august 2001 p-n junction Reversebias p-i-n junction
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

+ - n-type p-type Depletion Region
Image of page 4
+ - n-type p-type
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Optical Fibers Optical Fibers wikipedia
Image of page 6
Image of page 7

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

35 Years Ago 35 Years Ago D.Keck ……..A Technological “Syzygy” Occurred
Image of page 8
D.Keck
Image of page 9

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

D.Keck
Image of page 10
D.Keck
Image of page 11

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

And the Result! And the Result! 1 10 100 1000 1980 1985 1990 1995 2000 2005 Millions Internet Users PCs Moore's Law Fiber kms More Than 600 Million Users 652 Million PC’s in Use More than 1billion transistors per chip 650 million km of optical fiber deployed
Image of page 12
A Million-Fold Bandwidth A Million-Fold Bandwidth Increase Increase 10 10 10 8 10 6 10 4 10 2 1 1850 1900 1950 2000 Bit Rate (Bits/sec) 1st Telephone Coax-60 VC Oscillating Needle Telegraph 3600 VC 108,000 VC Fiber Optic Systems 10 12
Image of page 13

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Image of page 14
This is the end of the preview. Sign up to access the rest of the document.
  • Spring '07
  • GIANNELIS
  • refractive index, Total internal reflection, Oce wave ne

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern