NASA SBIR 2008 Solicitation


PROPOSAL NUMBER: 08-2 S1.05-9434
SUBTOPIC TITLE: Detector Technologies for UV, X-Ray, Gamma-Ray and Cosmic-Ray Instruments
PROPOSAL TITLE: Ultra-Low Noise Quad Photoreceiver for Space Based Laser Interferometric Gravity Wave Detection

SMALL BUSINESS CONCERN (Firm Name, Mail Address, City/State/Zip, Phone)
Discovery Semiconductors, Inc.
119 Silvia Street
Ewing, NJ 08628 - 3200
(609) 434-1311

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
Shubhashish Datta
119 Silvia St.
Ewing, NJ 08628 - 3200
(609) 434-1311

Expected Technology Readiness Level (TRL) upon completion of contract: 4 to 5

TECHNICAL ABSTRACT (Limit 2000 characters, approximately 200 words)
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.

POTENTIAL NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
The low-noise large area photoreceivers are suitable for numerous space-based optical systems, such as: 1) Long baseline laser interferometry; 2) Global 3D profiling of wind velocity; 3) River flow, height, and width monitoring for improved water resource management; and 4) Remote sensing missions to other planets. These devices can also to be used for ground-based free-space NASA applications, such as wind mapping for rocket launches.

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
The dual-depletion region technology allows high speed quad photodiode operation in conjunction with good noise performance. Consequently, the low-noise, large area photoreceivers can be used for military and commercial applications, such as: 1) Infrared sensing including biomedical imaging & spectroscopy; 2) Laser targeted munitions tracking; 3) Wind profiling for airport safety and wind farm site selection.

NASA's technology taxonomy has been developed by the SBIR-STTR program to disseminate awareness of proposed and awarded R/R&D in the agency. It is a listing of over 100 technologies, sorted into broad categories, of interest to NASA.

Airport Infrastructure and Safety
Biomolecular Sensors
Large Antennas and Telescopes
Optical & Photonic Materials
Radiation-Hard/Resistant Electronics
Semi-Conductors/Solid State Device Materials

Form Generated on 08-03-09 13:26