Title :
Protecting a power-laser diode from retroreflections by means of a fiber /spl lambda//4 retarder
Author :
Annovazzi-Lodi, V. ; Donati, S. ; Merlo, S. ; Zucchelli, L. ; Martinez, F.
Author_Institution :
Dipartimento di Elettronica, Pavia Univ., Italy
fDate :
4/1/1996 12:00:00 AM
Abstract :
A quarter-wave retarder made by a small loop of fiber on the laser pigtail is an effective means to protect the laser from retroreflections. Suppression factors of about 20 dB have been achieved with negligible insertion losses. An example of application is given. A method to measure the isolation is also presented.
Keywords :
optical communication equipment; optical fibre losses; optical fibres; optical isolators; optical pumping; reflectivity; semiconductor lasers; fiber /spl lambda//4 retarder; isolation measurement; laser pigtail; negligible insertion losses; power-laser diode protection; quarter-wave retarder; retroreflections; small fibre loop; suppression factors; Diodes; Fiber lasers; Isolators; Laser modes; Laser noise; Optical fiber polarization; Optical retarders; Power lasers; Protection; Pump lasers;
Journal_Title :
Photonics Technology Letters, IEEE
