Optical: systems and elements – Light interference
Reexamination Certificate
2003-01-08
2008-08-05
Chang, Audrey Y (Department: 2872)
Optical: systems and elements
Light interference
C356S452000, C356S453000
Reexamination Certificate
active
07408713
ABSTRACT:
The cavity in the mirror arm of a conventional interleaver is replaced by a wedge integral with the beamsplitter structure of the interleaver. Thus, the light reflected from the AR-coated surface of the wedge is dispersed away from the optics of the device. The beam emerging from the wedge surface is directed toward a tilted mirror that reflects it totally on-axis. As a result of the diversion of the light reflected from the wedge surface and the non-parallel disposition of the wedge surface with respect to the mirror, phase errors are virtually eliminated. In another embodiment, a second wedge is used with a second antireflective surface disposed in parallel to the first wedge's antireflective surface, and with a mirror normal to the optical axis of the device.
REFERENCES:
patent: 4411492 (1983-10-01), Bluege
patent: 4426155 (1984-01-01), Monchalin
patent: 5157458 (1992-10-01), Wagner et al.
patent: 5907404 (1999-05-01), Marron et al.
patent: 6115401 (2000-09-01), Scobey et al.
Dingel et al., “Multifunction optical filter with a Michelson-Gires-Tournois interferometer for wavelength-division-multiplexed network system applications” Optics Letters, vol. 23, No. 14, 1998.
Ai Chiayu
Hsieh Yung-Chieh
Chang Audrey Y
Durando Antonio R.
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