Ultra-Low Noise Quad Photoreceiver for Space Based Laser Interferometric Gravity Wave Detection

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNX09CD48P
Agency Tracking Number: 084566
Amount: $99,998.00
Phase: Phase I
Program: SBIR
Awards Year: 2009
Solicitation Year: 2008
Solicitation Topic Code: S1.05
Solicitation Number: N/A
Small Business Information
Discovery Semiconductors, Inc.
119 Silvia Street, Ewing, NJ, 08628-3200
DUNS: 824781769
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: Y
Principal Investigator
 Shubhashish Datta
 Principal Investigator
 (609) 434-1311
 sdatta@chipsat.com
Business Contact
 Abhay Joshi
Title: Business Official
Phone: (609) 434-1311
Email: Abhay@chipsat.com
Research Institution
N/A
Abstract
Gravity wave detection using space-based long-baseline laser interferometric sensors imposes stringent noise requirements on the system components, including the large area photoreceiver front ends. The proposed innovation utilizes dual depletion region technology to produce a large area (1mm diameter) 2x2 quad p-i-n InGaAs photodiode array having ~2.1pF capacitance per quadrant. The small capacitance of the quad photodiode array is leveraged in combination with a low-noise JFET-input operational amplifier to manufacture ultra-low noise quad photoreceiver array. Each element (quadrant) of the photoreceiver array will have an input equivalent current noise <2pA/sq.rt. Hz in a frequency range of 2 to 20MHz. This will enable shot noise dominated performance at an optical local oscillator power of ~100mW per quadrant.

* information listed above is at the time of submission.

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