Title :
Widely tunable multichannel grating cavity laser
Author :
Kwon, Oh Kee ; Kim, Jong Hoi ; Kim, Kang Ho ; Sim, Eun Deok ; Oh, Kwang Ryong
Author_Institution :
Opt. Devices Dept., Electron. & Telecommun. Res. Inst., Daejeon
Abstract :
A widely tunable grating cavity laser based on the Rowland circle construction for a concave grating is proposed and demonstrated. The device is implemented by employing multichannel array structure in a Littman configuration and fabricated by integrating all elements in an InP substrate. Only one channel is turned on at a time, with coarse tuning realized by selecting the appropriate element in the channel array and fine tuning by controlling the beam deflection provided by dispersive element. An overall tuning range of 50 nm with a sidemode suppression ratio of more than 30 dB has been achieved for the six-channel device
Keywords :
diffraction gratings; integrated optics; laser cavity resonators; laser tuning; semiconductor optical amplifiers; InP; InP substrate; Littman configuration; Rowland circle construction; beam deflection; cavity laser; channel array; coarse tuning; concave grating; dispersive element; multichannel array structure; multichannel grating laser; semiconductor optical amplifier; sidemode suppression; six-channel device; widely tunable laser; Arrayed waveguide gratings; Diffraction gratings; Dispersion; Laser beams; Laser tuning; Optical waveguides; Personal communication networks; Semiconductor optical amplifiers; Structural beams; Tunable circuits and devices; Beam deflection; concave grating; grating cavity lasers; monolithic integration; multichannel array; tunable lasers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.879556
