Encapsulated optoelectronic devices with controlled properties

Coherent light generators – Particular resonant cavity – Distributed feedback

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C372S029021

Reexamination Certificate

active

06845118

ABSTRACT:
An optoelectronic device, such as a VCSEL, is disclosed whose transmission does not change upon encapsulation by a material such as plastic, epoxy or other suitable encapsulant with a known index of refraction. The surface reflection of the VCSEL surface is very different depending on whether it is terminated in air or the encapsulant, with a much larger reflection in the case of air. It is known that the surface reflection can be made out of phase with the rest of the mirror, effectively increasing the transmission. The amount of the transmission increase can be adjusted by controlling the thickness of the surface layer. Once the VCSEL is encapsulated, the surface reflection is reduced, and the transmission at the facet is increased but the dephased reflection is also reduced. Depositing a surface layer whose index of refraction is similar to the encapsulant, and adjusting the surface layer thickness correctly, the overall transmission from the laser into the terminating material is unchanged, be it air or encapsulation. As a result, the laser properties such as slope efficiency and threshold current are unchanged upon encapsulation. The same procedure may be applied to devices other than VCSELs such as other types of lasers, LEDs, and resonant cavity photodetectors to achieve encapsulated optoelectronic components with controlled properties that remain unchanged upon encapsulation.

REFERENCES:
patent: 4510607 (1985-04-01), Garcia et al.
patent: 4847851 (1989-07-01), Dixon
patent: 5067788 (1991-11-01), Jannson et al.
patent: 5089860 (1992-02-01), Deppe et al.
patent: 5115441 (1992-05-01), Kopf et al.
patent: 5136152 (1992-08-01), Lee
patent: 5262675 (1993-11-01), Bausman, Jr.
patent: 5359447 (1994-10-01), Hahn et al.
patent: 5361244 (1994-11-01), Nakamura et al.
patent: 5425043 (1995-06-01), Holonyak, Jr. et al.
patent: 5432812 (1995-07-01), Kurobe et al.
patent: 5434939 (1995-07-01), Matsuda
patent: 5577064 (1996-11-01), Swirhun et al.
patent: 5615052 (1997-03-01), Doggett
patent: 5710753 (1998-01-01), Brazas, Jr.
patent: 5812582 (1998-09-01), Gilliland et al.
patent: 5953355 (1999-09-01), Kiely et al.
patent: 5955839 (1999-09-01), Jaffe et al.
patent: 6069905 (2000-05-01), Davis et al.
patent: 6160834 (2000-12-01), Scott
patent: 6246123 (2001-06-01), Landers et al.
patent: 6312304 (2001-11-01), Duthaler
patent: 6356686 (2002-03-01), Kuczynski
patent: 6392256 (2002-05-01), Scott et al.
patent: 6396712 (2002-05-01), Kuijk
patent: 6417017 (2002-07-01), Ih
patent: 6422766 (2002-07-01), Althaus et al.
patent: 6483864 (2002-11-01), Yuang et al.
patent: 6567435 (2003-05-01), Scott et al.
patent: 6670599 (2003-12-01), Wagner et al.
patent: 57-164585 (1982-09-01), None
patent: 01-222492 (1989-05-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Encapsulated optoelectronic devices with controlled properties does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Encapsulated optoelectronic devices with controlled properties, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Encapsulated optoelectronic devices with controlled properties will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3393659

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.