研究目的
Investigating the generation of phase-locked beams with a frequency offset at 6.834 GHz for applications in atom interferometers.
研究成果
The demonstrated method of generating phase-locked beams with a frequency difference of 6.834 GHz is applicable to atom interferometers, with phase noise below ?50 dBc/Hz in the 10 Hz to 100 kHz range. The technique also reduces laser power fluctuations by filtering unwanted modes.
研究不足
The injection range of the slave ECDL is narrower than its mode-hop free range, and the method requires precise tuning of the slave ECDL's current and piezo for optimal performance.
1：Experimental Design and Method Selection:
The experiment involves modulating the output of a master laser with an EOM and injecting it into a slave ECDL to achieve phase locking.
2：Sample Selection and Data Sources:
The master and slave ECDLs are homemade extended-cavity diode lasers in Littrow configuration.
3：List of Experimental Equipment and Materials:
Includes a phase modulated fiber EOM, signal generator, AOM, and photodiode for beat frequency analysis.
4：Experimental Procedures and Operational Workflow:
The master laser's output is modulated and injected into the slave ECDL, which amplifies the laser power and filters unwanted modes. The phase noise is measured using a phase noise detector.
5：Data Analysis Methods:
The beat frequency spectrum and phase noise power spectral density are analyzed to evaluate the phase locking performance.
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phase modulated fiber EOM
NIR-MPX800-LN-10
iXblue Photonics
Modulates the output of the master laser to generate sidebands for injection locking.
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signal generator
E8257D
Agilent
Drives the EOM at low phase noise mode.
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AOM
Serves as an additional phase shifter and optical switch for phase noise measurements.
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photodiode
Detects the beat frequency for analysis.
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phase noise detector
5115A
Symmetricom
Measures the phase noise of the generated Raman lasers.
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