Title :
Novel tunable DFB laser with separated high coupling coefficient gratings
Author :
Nunoya, Nobuhiro ; Shibata, Yasuo ; Ishii, Hiroyuki ; Okamoto, Hiroshi ; Kawaguchi, Yoshihiro ; Kondo, Yasuhiro ; Oohashi, Hiromi ; Kato, Kazutoshi
Author_Institution :
NTT Photonics Labs., NTT Corp., Kanagawa
Abstract :
A novel continuously tunable DFB laser is proposed that has separated high coupling coefficient gratings with simple current tuning. Deep corrugations designed to realize a high coupling coefficient are fabricated by using dry etching followed by shallow wet chemical etching and slow speed re-growth. A large stop-band width achieved by using a grating with a coupling coefficient as high as 200 cm-1 provides a continuous tuning wavelength range of 2.1 nm
Keywords :
diffraction gratings; distributed feedback lasers; etching; laser tuning; semiconductor lasers; DFB laser; current tuning; deep corrugations; dry etching; gratings; high coupling coefficient; semiconductor lasers; shallow wet chemical etching; slow speed regrowth; tunable laser; Distributed feedback devices; Gas lasers; Gratings; Laser feedback; Laser theory; Laser tuning; Optical coupling; Optical tuning; Semiconductor laser arrays; Tunable circuits and devices;
Conference_Titel :
Indium Phosphide and Related Materials Conference Proceedings, 2006 International Conference on
Conference_Location :
Princeton, NJ
Print_ISBN :
0-7803-9558-1
DOI :
10.1109/ICIPRM.2006.1634113
