Sideband Raman light for cold atom interferometer through phase modulation

A method for generating a single-sideband Raman light for cold atom interferometer through phase modulation, wherein a system for generating the single-sideband Raman light for cold atom interferometer through phase modulation comprises a laser source, an EOM, a local microwave oscillator, a narrow-bandwidth optical-fiber filter, an optical-fiber power amplifier, and a frequency doubling crystal;

• and
• the method comprises:
• a Raman sideband generation process:
• the laser source generates laser with a frequency of ω, and the laser is input to the EOM;
• the local microwave oscillator applies a modulation voltage with a frequency of δ to the EOM, and the EOM outputs double-sideband frequency-modulated light with a frequency of ω±nδ, wherein n=0,1,2, . . . ;
• an excess sideband filtering process:
• injecting the double-sideband frequency-modulated light output by the EOM into the narrow-bandwidth optical-fiber filter, which is matched with the target frequency light to filter the excess sidebands except for the matched target frequency light, and yielding the target frequency laser;
• and
• a frequency doubling process:
• performing a power amplification on the target frequency laser by using the optical-fiber power amplifier, and then performing a frequency doubling by using the frequency doubling crystal, wherein the light output after the frequency doubling is the single-sideband Raman light.

A cold atom interferometer, employing Raman light generated by a system for generating a single-sideband Raman light for cold atom interferometer through phase modulation;

• and
• the system for generating the single-sideband Raman light for cold atom interferometer through phase modulation comprises a laser source, an EOM, a local microwave oscillator, a narrow-bandwidth optical-fiber filter, an optical-fiber power amplifier, and a frequency doubling crystal, wherein
• the laser source generates laser with a frequency of ω, and the laser is input to the EOM;
• the local microwave oscillator applies a modulation voltage with a frequency of δ to the EOM, and the EOM outputs double-sideband frequency-modulated light with a frequency of ω±nδ, wherein n=0,1,2, . . . ;
• the double-sideband frequency-modulated light is input to the narrow-bandwidth optical-fiber filter, which is matched with the target frequency light;
• the narrow-bandwidth optical-fiber filter outputs the target frequency laser, which is successively input to the optical-fiber power amplifier and the frequency doubling crystal and yields the single-sideband Raman light.