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: NNX10CA59C
Agency Tracking Number: 084566
Amount: $600,000.00
Phase: Phase II
Program: SBIR
Awards Year: 2010
Solicitation Year: 2008
Solicitation Topic Code: S1.05
Solicitation Number: N/A
Small Business Information
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
Business Contact
 Abhay Joshi
Title: President & CEO
Phone: (609) 609-1311
Email: Abhay@chipsat.com
Research Institution
We propose to design and develop 2x2 quad p-i-n InGaAs Photoreceivers having the following characteristics: (a) Active area diameter 0.75 mm; (b) Wavelength coverage 850 to 1700 nm, with responsivity of 0.7 A/W at 1064 nm; (c) Bandwidth up to 20 MHz for the individual quadrant; (d) Group Delay < 6 degrees/MHz; (e) Photodiode capacitance for individual quadrant of <1.5 pF at a reverse bias of 5V; (f) Cross talk between the neighboring quadrants of -45 to -50 dB; (g) Equivalent excess noise per quadrant <2 pA/sq. rt. Hz in the pass band; and (h) Noise Equivalent Power (NEP) due to excess noise <2.9 pW/sq. rt. Hz in the pass band. Six prototype quad photoreceivers will be delivered during the Phase II contract. These devices will be an enabling technology for the success of the Laser Interferometry Space Antenna (LISA) which proposes to detect gravity waves by using a space based interferometric sensor having a baseline of 5 million kilometers. Detection of gravity waves is crucial to our fundamental understanding of nature, including the origin of the universe and experimental verification of the theory of relativity.

* Information listed above is at the time of submission. *

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