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Wide-field-of-view heterodyne receiver at 1.06 microm with photorefractive InP:Fe
Optics Letters
|October 16, 2009
Summary
This study demonstrates a wide-field-of-view heterodyne receiver using photorefractive InP:Fe. The novel setup achieved high diffraction efficiency and stable performance over an 8-degree field of view.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Heterodyne receivers are crucial for sensitive signal detection.
- Photorefractive materials offer unique light-manipulating properties.
Purpose of the Study:
- To develop a wide-field-of-view heterodyne receiver.
- To investigate the performance of photorefractive InP:Fe in a double phase-conjugate mirror configuration.
Main Methods:
- Utilized photorefractive Indium Phosphide doped with Iron (InP:Fe) with an applied DC electric field.
- Configured a double phase-conjugate mirror (DPGM) for the heterodyne receiver.
- Measured diffraction efficiencies, intermediate-frequency (IF) power stability, and rise times.
Main Results:
- Achieved large DPGM diffraction efficiencies exceeding 20%.
- Observed stable IF powers independent of signal-beam angle over an 8-degree field of view.
- Recorded a minimum rise time of approximately 65 ms.
- Investigated the impact of electric field strength and temperature on rise time.
Conclusions:
- Photorefractive InP:Fe in a DPGM configuration is suitable for wide-field-of-view heterodyne receivers.
- The system demonstrates robust performance with high efficiency and stability.
- Further optimization of electric field and temperature can refine response times.
