cw	Continuous wave
DFG	Difference frequency generation
FF	Fundamental frequency
FFT	Fast Fourier transform
FSR	Free spectral range
FWM	Four-wave mixing
GVD	Group velocity dispersion
MI	Modulation instability
OFC	Optical frequency comb
OPO	Optical parametric oscillator
SH	Second harmonic
SHG	Second harmonic generation
TH	Third harmonic