A broadly tunable single-frequency external-cavity laser is demonstrated by coupling a tunable fiber-optic evanescent-grating reflective filter1,2 to an AR-coated semiconductor laser. Tunable external-fiber-cavity lasers have recently been demonstrated,3,4 but single-frequency operation was not observed due either to weak feedback3 or excessively large cavity lengths.4 For the laser presented in this paper, enhanced tuning range and single-frequency operation are achieved by using a high reflectivity filter (>80%) and a relatively small cavity length (≃8 cm).

© 1988 Optical Society of America

PDF Article


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription