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Small Dimension High-Efficiency High-Speed Vertical-Cavity Surface-Emitting Lasers

Technology Benefits

Low power dissipation due to: Small dimension of <5 μm in diameter Reduced parasitic capacitance Reduced optical scattering loss High bandwidth of at least 15 GHz makes for at least 30 Gbit/s operation Improved performance High-efficiency and high-speed

Technology Application

High-speed sensing; High-speed communication Optical Interconnects in data centers and computers

Detailed Technology Description

Researchers at UC Santa Barbara have designed a Vertical-Cavity Surface-Emitting Laser (VCSEL) applicable to optoelectronics, specifically optical interconnects. The invention uses a thicker oxide aperture with a tapered tip designed to reduce the mode volume with minimal added loss. The parasitics are further reduced by using deep oxidation layers. With these novel features, small-dimension high-efficiency high-speed VCSELs can be achieved.

Supplementary Information

Patent Number: US7916768B2
Application Number: US2009410388A
Inventor: Chang, Yu-Chia | Coldren, Larry A.
Priority Date: 24 Mar 2008
Priority Number: US7916768B2
Application Date: 24 Mar 2009
Publication Date: 29 Mar 2011
IPC Current: H01S000500
US Class: 372050124 | 372026 | 372046013 | 3720501 | 37205011
Assignee Applicant: The Regents of the University of California
Title: Small dimension high-efficiency high-speed vertical-cavity surface-emitting lasers
Usefulness: Small dimension high-efficiency high-speed vertical-cavity surface-emitting lasers
Novelty: Vertical-cavity surface-emitting laser for use in optical interconnecting application, has aperture provided between active region and top mirror for reducing optical mode's diameter without increasing round trip scattering loss

Industry

Optics

Sub Group

Laser

Application No.

7916768

Others

Background

Oxide apertures within the Vertical-Cavity Surface-Emitting Laser (VCSEL) have been used to minimize power dissipation by constricting current within the lasing modes and guiding laser modes (thereby increasing overlap between carriers and optical modes and reducing sidewall losses). However, these apertures have produced undesirable optical scattering due to their imperfect shape and a larger mode diameter is needed for low optical loss.

Additional Technologies by these Inventors

Tunable Laser Source with Integrated Optical Modulator

Tech ID/UC Case

22050/2008-464-0

Related Cases

2008-464-0

Country/Region

USA

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