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On-chip high sensitivity laser frequency sensing with Brillouin mutually-modulated cross-gain modulation
Feng Gao1, Ravi Pant, Enbang Li
1Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), Institute of Photonics and Optical Science (IPOS), School of Physics, The University of Sydney, New South Wales 2006, Australia. fenggao@nankai.edu.cn
Optics Express
|April 11, 2013
Summary
This study introduces the first photonic-chip laser frequency sensor utilizing Brillouin mutually-modulated cross-gain modulation (MMXGM). The sensor achieves high sensitivity for precise laser frequency measurements on a chip.
Area of Science:
- Photonics
- Integrated Optics
- Sensing Technology
Background:
- Laser frequency sensing is crucial for various applications.
- Existing methods may lack chip-scale integration or sufficient sensitivity.
- Brillouin scattering offers a promising physical mechanism for sensing.
Purpose of the Study:
- To demonstrate the first photonic-chip laser frequency sensor.
- To leverage Brillouin mutually-modulated cross-gain modulation (MMXGM) for enhanced sensing.
- To achieve high sensitivity in a compact, integrated platform.
Main Methods:
- Implementation of a Brillouin MMXGM sensor on a photonic chip.
- Utilizing a ~7 cm long chalcogenide rib waveguide.
- Operating at a modulation frequency of 50 kHz.
Main Results:
- Successful demonstration of a photonic-chip laser frequency sensor.
- Achieved a large sensitivity of approximately 9.5 mrad/kHz.
- The sensor shows significant phase shift response to probe carrier frequency.
Conclusions:
- Brillouin MMXGM is effective for chip-scale laser frequency sensing.
- The developed sensor offers high sensitivity in a compact form factor.
- This technology has potential for advanced optical metrology and communication systems.
