T. Saitoh et al., AN OPTICAL FREQUENCY-SYNTHESIZER USING A WAVE-GUIDE-TYPE OPTICAL FREQUENCY COMB GENERATOR AT 1.5-MU-M WAVELENGTH, IEEE photonics technology letters, 8(11), 1996, pp. 1543-1545
An optical frequency synthesizer was developed at 1.5-mu m wavelength
region by utilizing a diode laser whose frequency was locked to an abs
orption line (P-branch, J = 23) of acetylene, a frequency tunable lase
r, and a waveguide-type optical frequency comb generator, This synthes
izer has the frequency tunable range of 1.3 THz around 154-mu m wavele
ngth and absolute frequency stability of sigma = 4.5 x 10(-10) at 1 s
integration time.