FTS	Fourier transform spectroscopy
FSR	Free spectral range
TD-SI	Time domain-spectral interferometry
SDI	Spectral domain interferometry
SWI	Swept-wavelength interferometry
OFDR	Optical frequency domain reflectometry
CEO	Carrier envelope offset
MZI	Mach Zehnder interferometry
AWG	Arrayed waveguide grating
DSP	Digital signal processing
ADC	Analog to digital converter
DRS	Double resonance spectroscopy
ISRS	Impulsive stimulated Raman scattering
OTDR	Optical time domain reflectometry
SS	Swept source
FD	Fourier domain
WDM	Wavelength division multiplexing
OFDM	Orthogonal frequency domain modulation
RF	Radio frequency
CW	Carrier wave
DUT	Device under test
SNR	Signal to noise ratio
OSNR	Optical signal to noise ratio
MLL	Mode-locked laser
FDML	Fourier domain mode locking
DCI	Dual-comb interferometry
SWI	Swept-wavelength interferometry
DC-SWI	Dual comb swept wavelength interferometry
EO	Electrooptic
EOM	Electrooptic modulator
PM	Phase modulator
IM	Intensity modulator
MZM	Mach–Zehnder modulator
OCT	Optical coherence tomography
ECL	External cavity laser
FFT	Fast Fourier transform
FFP-TF	Fiber Fabry–Perot filter
FFP-FC	Frequency comb fiber Fabry–Perot filter
FSR	Free spectral range
DAQ	Data acquisition