Title :
Narrow-linewidth laser with a prism grating/GRIN rod lens combination serving as external cavity
Author :
Wittmann, Juergen ; Gaukel, G.
Author_Institution :
Siemens AG, Research Laboratories, Mÿnchen, West Germany
Abstract :
An external cavity laser transmitter module with only 20 mm cavity length is presented. A prism grating is used as a frequency-selective reflector. The coupling element between the laser diode and the prism grating is a permanently attached GRIN rod lens. Linewidths below 500 kHz at an output power of approximately 2mW have been reached with this compact set-up.
Keywords :
diffraction gratings; gradient index optics; laser cavity resonators; lenses; optical communication equipment; semiconductor junction lasers; 2 mW; 20 mm; GRIN rod lens; cavity length; compact set-up; coupling element; external cavity; frequency-selective reflector; graded refractive index; laser transmitter module; narrow linewidth laser; prism grating; semiconductor lasers;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19870378
