Cascaded Acoustooptic/Fiber Fabry-Perot Filter With Finesse Over 2000

Abstract

A compound optical filter consisting of an integrated acoustooptic filter in series with a fiber Fabry-Perot filter possesses a very high effective finesse of over 2000 as well as the unique multichannel passband capability of the acoustooptic filter. The fine-grain element in this pair is a narrow (0.5 Å passband Fabry-Perot filter, and the coarse-grain element is a wide tuning range (130 nm) polarization-independent integrated acoustooptic filter. The composite device has the narrow passband of the Fabry-Perot, the wide tuning range of the. © 1993 IEEE