Micromachined pellicle splitters and tunable laser modules...

Details Micromachined pellicle splitters and tunable laser modules... Micromachined pellicle splitters and tunable laser modules...

2005-02-22

2005-02-22

Dang, Hung Xuan (Department: 2873)

Optical: systems and elements

Single channel simultaneously to or from plural channels

By refraction at beam splitting or combining surface

C359S634000, C359S582000, C359S583000, C359S629000

Reexamination Certificate

active

06859330

ABSTRACT:
A micromachined pellicle beam splitter and method of manufacture thereof are disclosed. In one embodiment, the beam splitter includes a silicon frame with a silicon nitride membrane attached to the frame and covering an opening through the frame. Other materials may be utilized, however, the coefficient of thermal expansion (CTE) of the membrane should be greater than that of the frame. The beam splitter may be manufactured by coating a silicon substrate with a layer of silicon nitride, patterning an opposite side of the silicon substrate with a photoresist or a metallic layer to define an opening an etching an opening through the substrate to the silicon nitride with either a dry etch or wet etch technique. An improved tunable laser module incorporating the micromachined pellicle beam splitter and a method of tuning a laser diode are also disclosed.

REFERENCES:
patent: 4574263 (1986-03-01), Liddiard
patent: 6192059 (2001-02-01), Karioja et al.
patent: 6215802 (2001-04-01), Lunt
patent: 6490397 (2002-12-01), Kato et al.
patent: 6509987 (2003-01-01), Hunziker et al.
patent: 6544693 (2003-04-01), Levinson et al.

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