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Ultra-Low Noise Quad Photoreceiver for Space Based Laser Interferometric…

Award Information

National Aeronautics and Space Administration
Award ID:
Program Year/Program:
2010 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Discovery Semiconductors, Inc.
119 Silvia Street Ewing, NJ 08628-
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Woman-Owned: No
Minority-Owned: Yes
HUBZone-Owned: No
Phase 2
Fiscal Year: 2010
Title: Ultra-Low Noise Quad Photoreceiver for Space Based Laser Interferometric Gravity Wave Detection
Agency: NASA
Contract: NNX10CA59C
Award Amount: $600,000.00


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.

Principal Investigator:

Shubhashish Datta
Principal Investigator

Business Contact:

Abhay M. Joshi
President & CEO
Small Business Information at Submission:

Discovery Semiconductors, Inc.
119 Silvia Street Ewing, NJ 08628

EIN/Tax ID: 223140182
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No