Title :
16-wavelength gain-coupled DFB laser array with fine tunability
Author :
Li, G.P. ; Makino, T. ; Sarangan, A. ; Huang, W.
Author_Institution :
Bell-Northern Res., Ottawa, Ont., Canada
Abstract :
16-wavelength semiconductor laser array with fine wavelength tunability is demonstrated, utilizing gain-coupled distributed feedback (DFB) lasers with different ridge waveguide widths. Besides the coarse tuning by the ridge widths, the fine post-fabrication tunability for individual lasers in the array is achieved with a Ti thin-film resistor integrated on the chip. Due to the gain-coupling effect, 16 single-mode lasing wavelengths around 1.55 μm in /spl sim/1 nm spacing are obtained simultaneously. An effective fine-tuning up to 1 nm is observed at a moderate heating power of 100 mW.
Keywords :
distributed feedback lasers; laser tuning; semiconductor laser arrays; 1.55 micron; 100 mW; Ti; Ti thin-film resistor; distributed feedback lasers; multiwavelength gain-coupled DFB laser array; ridge waveguide; semiconductor lasers; single-mode lasing; wavelength tunability; Distributed feedback devices; Laser feedback; Laser modes; Laser tuning; Optical arrays; Resistors; Semiconductor laser arrays; Semiconductor thin films; Semiconductor waveguides; Waveguide lasers;
Journal_Title :
Photonics Technology Letters, IEEE
