Title :
Constant output power and low linewidth in a simple wide-tuning DFB laser with multiwavelength grating
Author :
Talneau, Anne ; Slempkes, Serge ; Ougazzaden, Abdallah
Author_Institution :
CNET, Bagneux, France
fDate :
4/1/1997 12:00:00 AM
Abstract :
Step-tuning to widely spaced predefined wavelengths using a single current is demonstrated. A compound distributed-feedback-distributed-Bragg-reflector (DFB-DBR) GaInAsP laser structure including multiwavelength gratings (MWGs) on both sections is proposed. MWGs are fabricated by holographic lithography. Each MWG acts as a spectral comb filter. Using vernier effect between passive and active MWGs, DFB modes are successively selected. As wavelength selectivity is performed on the active medium without help of facet reflectivity, output power remains the same on all wavelengths. Four 4-nm-spaced DFB modes are accessed with constant optical output power. Advantages of such a configuration for integrated components are discussed
Keywords :
III-V semiconductors; diffraction gratings; distributed Bragg reflector lasers; distributed feedback lasers; gallium arsenide; gallium compounds; holography; indium compounds; laser modes; laser tuning; optical fabrication; optical transmitters; optical waveguide filters; photolithography; semiconductor lasers; spectral line breadth; waveguide lasers; wavelength division multiplexing; GaInAsP laser structure; active medium; compound DFB-DBR laser structure; compound distributed-feedback-distributed-Bragg-reflector laser structure; constant optical output power; constant output power; facet reflectivity; holographic lithography; integrated components; low linewidth; multiwavelength grating; multiwavelength gratings; nm-spaced DFB modes; output power; simple wide-tuning DFB laser; single current; spectral comb filter; step-tuning; vernier effect; waveguide lasers; wavelength selectivity; widely spaced predefined wavelengths; Distributed feedback devices; Fiber lasers; Gratings; Holography; Laser modes; Laser tuning; Optical filters; Optical tuning; Power generation; Power lasers;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/2944.605714
