Hermetically sealed optical subassembly

Details Hermetically sealed optical subassembly Hermetically sealed optical subassembly

2005-03-01

2005-03-01

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Housings

C385S092000, C359S362000

Reexamination Certificate

active

06861641

ABSTRACT:
An optical subassembly includes a high speed ceramic substrate having cavity containing an array of photodetectors, and a glass or silicon window for covering the cavity and forming a hermetic seal. A retainer is attached to the window for direct or indirect attachment to a fiber. The hermetic seal protects the device from moisture and other environmental conditions. The window has an index of refraction higher than air that effectively increases the optical pathlength sufficient while maintaining an acceptable coupling efficiency between the optoelectronic device and a fiber. This provides increased spacing within which to place and interconnect components within the cavity on the substrate. In alternate embodiments, the window is decoupled from direct contact with the retainer via a metal frame or ring. Decoupling the window from direct contact with the retainer helps prevent cracking of the window due to mismatches in the coefficients of thermal expansion between the window and the retainer.

REFERENCES:
patent: 4616899 (1986-10-01), Schlafer
patent: 4803689 (1989-02-01), Shibanuma
patent: 5511140 (1996-04-01), Cina et al.
patent: 5631987 (1997-05-01), Lasky et al.
patent: 6061493 (2000-05-01), Gilliland et al.
patent: 6302596 (2001-10-01), Cohen et al.
patent: 6686588 (2004-02-01), Webster et al.

Affiliated with

Also associated with

Rating

Hermetically sealed optical subassembly does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hermetically sealed optical subassembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hermetically sealed optical subassembly will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3381243