Quantum Cascade Laser-Based Local Oscillator for Terahertz Astronomy (7275-070)

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$69,994.00
Award Year:
2005
Program:
SBIR
Phase:
Phase I
Contract:
NNC05CA87C
Agency Tracking Number:
040629
Solicitation Year:
2004
Solicitation Topic Code:
E1.06
Solicitation Number:
n/a
Small Business Information
Physical Sciences Inc
20 New England Business Ctr, Andover, MA, 01810-1077
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
073800062
Principal Investigator:
Joel Hensley
Principal Investigator
(978) 689-0003
hensley@psicorp.com
Business Contact:
B. David B. David Green
President R&D Operations
(978) 689-0003
green@psicorp.com
Research Institution:
n/a
Abstract
Scientists at JPL measure radiation emitted in the far-infrared (or terahertz) region of the spectrum to study the history of the universe and the Earth's atmosphere. The most commonly used detection technique is frequency mixing between that emission and a local oscillator operating at a frequency close to the emission line. The local oscillators available today, such as optically pumped terahertz lasers or frequency-multiplied millimeter-wave sources, suffer from a number of shortcomings including limited tuning range, inadequate wavelength coverage, large size, and low wallplug efficiency. Physical Sciences Inc. has recently demonstrated a novel, tunable THz laser source based on an external cavity stabilized THz Quantum Cascade Laser with discontinuous tuning over a 30 GHz band at 147 wavenumbers. In the proposed Phase I program, we will use an available 158 wavenumber THz QCL to optimize the external cavity design for continuous, mode-hop free tuning over an expected range of 100 GHz with a target laser linewidth below 1 MHz. Such a laser has never been previously demonstrated. During Phase II we will prove practicality by optimizing the properties of the laser, packaging it into a form suitable for terahertz emission experiments, and delivering it to JPL.

* information listed above is at the time of submission.

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