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High Efficiency, Large-area, 1550 nm InGaAs Photodiodes

Award Information

Department of Commerce
National Institute of Standards and Technology
Award ID:
Program Year/Program:
2009 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Voxtel Inc.
15985 NW Schendel Avenue Suite 200 Beaverton, OR 97006-
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2009
Title: High Efficiency, Large-area, 1550 nm InGaAs Photodiodes
Agency / Branch: DOC / NIST
Contract: N/A
Award Amount: $89,998.00


A stable, well characterized InGaAs materials growth and photodetector fabrication process will be used to fabricate matched photodiodes optimized for balanced homodyne detection. The 1-mm-diameter p-i-n photodetectors will be manufactured back-illuminated with a 5-micron absorber, allowing residual light to reflect off the front-side metal to make a double pass through the active layer. Ultra-high-purity InGaAs will be used so that the absorber can operate fully depleted at relatively low operating voltages (< -5 VDC). The ultra-pure InGaAs will also reduce variation across the 1-mm-diameter detector and prevent breakdown. Operating the detector fully depleted will decrease the carrier transport time and therefore reduce carrier recombination; it will also reduce the detector¿s capacitance. So that stray capacitance is minimized, the detectors will be bump-bonded directly to a sub-mount; the detector will then be integrated with low-noise transimpedance amplifiers and integrated with a three-stage thermoelectric cooler in a hermetic TO-5 package. The matched detectors will be testing and characterized in an optical homodyne detection system.

Principal Investigator:

Andrew Huntington

Business Contact:

Small Business Information at Submission:

Voxtel, Inc.
12725 SW Millikan Way, Suite 230 Beaverton, OR 97005

Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No