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Low Loss Tunable Optical Filter using Silicon Photonic Band Gap Mirrors

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2 Author(s)
Lipson, A. ; Imperial Coll. London, London ; Yeatman, E.M.

A fiber-pigtailed tunable optical filter is described, based on silicon-air photonic bandgap mirrors. The high reflectance achievable in these mirrors allows a short Fabry-Perot cavity to be employed, such that lensed fibers provide sufficient collimation without additional focusing elements. Mirror surface orientation and quality are shown to be crucial to performance, and a two-stage etch process is used to satisfy this requirement. MEMS elecrostatic actuation of one mirror is used for tuning, and the final device achieves fiber-to-fiber insertion loss of 11 dB, passband width 3 nm, and tuning range ap 10 nm.

Published in:

Solid-State Sensors, Actuators and Microsystems Conference, 2007. TRANSDUCERS 2007. International

Date of Conference:

10-14 June 2007