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Long resonator micromachined tunable GaAs-AlAs Fabry-Perot filter

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8 Author(s)
Peerlings, J. ; Inst. fur Hochfrequenztech., Tech. Hochschule Darmstadt, Germany ; Dehe, A. ; Vogt, A. ; Tilsch, M.
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We present novel concepts for tunable optical filters. Long resonant cavities of about 30-/spl mu/m length have been realized with two-chip designs. GaAs technology has been applied to filters that are designed for the use in dense wavelength-division multiplexing (WDM) at wavelengths around 1550 nm. A finesse of 46.7, a full-width at half-maximum (FWHM) of 1.2 nm and electrostatic tuning over a range of 103 nm with an applied voltage of 35 V has been achieved. An alternative tuning concept that allows to tune the resonator length 4 /spl mu/m by heating Ni-Cr resistors placed on the suspending beams of a membrane with an applied voltage of 2.7 V has been realized.

Published in:

Photonics Technology Letters, IEEE  (Volume:9 ,  Issue: 9 )

Date of Publication:

Sept. 1997

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