Addressable wedge etalon filter

Details Addressable wedge etalon filter Addressable wedge etalon filter

1991-02-07

1992-07-07

Laroche, Eugene R.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359298, 359308, 356352, G02F 103, G02F 133, G02B 2608, G01B 902

Patent

active

051287986

ABSTRACT:
Apparatus is described for achieving wavelength selection. Furthermore, the apparatus exhibits very high wavelength resolution, stable operation and rapid returning. A bundle of multi-wavelength light, entering the device, is acoustooptically deflected. This is done by driving two orthogonal acoustic transducrs of the deflector with two suitable frequencies fx and fy. The light so deflected passes first through a wedge etalon having a taper along the X-axis and then through a second wedge etalon having a taper along the Y-axis. The pair of wedges forms two, single-cavity etalons. Depending on the choice of fx and fy, any wavelength within the wavelength range covered by the two, single-cavity etalons can be selected rapidly and accurately.

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