These are the most frequently used words in this book.
absorption
amplifiers
applications
band
between
carrier
case
change
components
constant
core
crystal
current
detector
devices
different
direction
dispersion
effect
efficiency
electric
electron
emission
energy
equation
example
fibre
field
figure
frequency
function
gain
given
grating
high
however
increases
index
input
lamps
large
laser
layer
leds
lett
level
light
loss
low
material
may
method
mode
modulator
nm
noise
nonlinear
number
optical
optics
order
output
phase
photon
polarization
possible
power
process
propagation
properties
pulse
quantum
radiation
range
refractive
region
result
section
semiconductor
shown
signal
source
spectral
state
structure
systems
temperature
terms
thus
time
transmission
two
type
use
used
value
voltage
wave
waveguide
wavelength