ECE4853
Sources:
Coversheet
Quiz #1: Power coupling
B = B0 cos
Lambertian (LED)
B = B0 cos m
Non-Lambertian (ideal laser):
sin 2
cos 2
1
=
+
B0 ( , ) B0 cos T B0 cos L
Edge-emitting laser:
Step-index fiber
Numerical aperture (= NA) = n0 sin 0 =
Grade
ECE4853
Coversheet
Quiz #2: Fibers and sources
q = 1.602 x 10-10 cm/ns
Constants: c = 30cm/ns,
Ephph = 1.24eV.m
Optical Fibers:
Numerical aperture:
V=
Normalized frequency
single-mode fiber:
= sin 0
2
n12 n 2
(= NA) =
2a
V 2.405
NA
a = core radius
(= fir
ECE4853
Quiz 3 (Take-home)
25/Apr/2012
All work must be independent of each other, particularly study buddies. Please do not leave me with an
academic dishonesty problem to consider.
Due (not later than) Apr 29, 5:00PM
(before exam week)
Submit electronic
ECE4853
Cover sheet
Constants: c = 30cm/ns
Eph*PH = 1.24 eV.m
VT =
Quiz #4, Photodetectors
q = 1.6 x 10-4fC
kT
= .02585V at T = 300K
q
Semiconductors:
ni = 1.5 1010 # / cm 3
for Si (default)
s = 0.1fF/m
q/S = 1.6 x 10-3 V.m
C = 1.24/EG
responsivity R = /1