Title :
Stable and widely tunable dual-wavelength continuous-wave operation of a semiconductor laser in a novel Fabry-Perot grating-lens external cavity
Author :
Lee, Ka-Suen ; Shu, Chester
Author_Institution :
Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Shatin, Hong Kong
fDate :
10/1/1997 12:00:00 AM
Abstract :
We propose and experimentally demonstrate an external-cavity configuration for a 1.5-μm InGaAsP semiconductor laser to generate tunable dual-wavelength optical output over a wavelength range of 60.8 nm. The Fabry-Perot (FP) grating-lens external cavity consists of a FP filter, a diffraction grating, a converging lens, and a totally reflecting mirror. The dual wavelength CW output has a spectral separation of 0.9 nm and a side-mode-suppression ratio of over 25 dB throughout the tuning range. The relative intensity variation between the two lasing wavelengths is smaller than 1.2 dB without any observable mode hopping
Keywords :
Fabry-Perot resonators; III-V semiconductors; antireflection coatings; diffraction gratings; gallium arsenide; indium compounds; laser cavity resonators; laser mirrors; laser stability; laser tuning; lenses; semiconductor lasers; 1.5 mum; AR coating; FP filter; Fabry-Perot grating-lens external cavity; InGaAsP; InGaAsP semiconductor laser; converging lens; diffraction grating; relative intensity variation; side-mode-suppression ratio; spectral separation; totally reflecting mirror; tunable dual-wavelength continuous-wave operation; tunable dual-wavelength optical output; Arrayed waveguide gratings; Laser stability; Laser tuning; Optical feedback; Optical filters; Optical resonators; Optical sensors; Semiconductor laser arrays; Semiconductor lasers; Tunable circuits and devices;
Journal_Title :
Quantum Electronics, IEEE Journal of
