© 2026 Aqora Quantum S.A.S.

Terms Privacy Legal Notice

arXiv:1310.7375 · Optics Letters

Injection locking of two frequency-doubled lasers with 32 GHz offset for driving Raman transitions with low photon scattering in Ca43^+

Norbert M. Linke, Christopher J. Ballance, D. M. Lucas

Published Nov 21, 2013• 9 citations

Abstract

We describe the injection locking of two infrared (794 nm) laser diodes that are each part of a frequency-doubled laser system. An acousto-optic modulator in the injection path gives an offset of 1.6 GHz between the lasers for driving Raman transitions between states in the hyperfine split (by 3.2 GHz) ground level of 43Ca+. The offset can be disabled for use in 40Ca+. We measure the relative linewidth of the frequency-doubled beams to be 42 mHz in an optical heterodyne measurement. The use of both injection locking and frequency doubling combines spectral purity with high optical power. Our scheme is applicable for providing Raman beams across other ion species and neutral atoms where coherent optical manipulation is required.

DOI: 10.1364/ol.38.005087

Related papers

Production of raman laser beams using injection-locking technique

Sang Eon Park, Taeg Yong Kwon, Hoseong Lee

We produced two Raman-laser beams with a frequency offset of 9.2 GHz by injection-locking of a master diode-laser to a slave diode-laser. The master laser was phase-modulated at 9.2 GHz while the laser beam passed through an electrooptic modulator. The phase-modulated beam was injected into the slave laser that was oscillating around one of the side-bands of the master laser. The relative linewidth of the two lasers was less than 10 Hz. Using these laser beams, coherent population trapping resonance of cesium atoms was observed for the purpose of testing the phase-coherence of the laser beams.

IEEE Transactions on Instrumentation and Measurement•Apr 1, 2003•20 citations

Note: Generation of Raman laser beams based on a sideband injection-locking technique using a fiber electro-optical modulator

Hongbo Xue, Yanying Feng, X. J. Wang +2 more

Two phase-coherent Raman laser beams with a frequency offset of 6.835 GHz were generated by sideband injection-locking technique. A master diode laser was phase-modulated at 6.835 GHz by a fiber electro-optic modulator. A slave diode was injection-locked to the -1 sideband of the phase-modulated beam, and another diode was locked to the master laser carrier. This method produced stable and spatially separated Raman lasers with a large frequency shift range (>180 MHz). The relative linewidth of these two beams was ∼1 Hz, and the unwanted carrier mode was suppressed down to -24 dB. Stimulated Raman transitions and Ramsey fringes were driven by Raman lasers in a cold atomic beam.

Review of Scientific Instruments•Apr 1, 2013•12 citations

The raman laser system for Mach-Zehnder atom interferometry

Nan Li, Kaikai Huang, Xuanhui Lu

We produced two Raman-laser beams with a frequency offset of 6.834GHz by injection-locking of a master diode-laser to a slave diode-laser. The master laser was phase-modulated at 6.834 GHz with an Electro-Optic Modulator and then injected into the slave laser that was oscillating around one of the side-bands. The relative linewidth of the two lasers was less than 1 Hz. Utilizing these laser beams, we realized the coherent manipulation of atomic wave packets in a Mach-Zehnder type atom interferometry.

European Frequency and Time Forum•Apr 1, 2016•0 citations

Injection locking of Raman laser beams in cold atom interferometers

Ling Wang, Yao Zhanwei, Xiong Zong-yuan +3 more

Raman pulse sequences are generally used to coherently manipulate the atomic wave packet in an atom interferometer.High power Raman beams allow more atoms join in the velocity-sensitive stimulated Raman transition,and that will be helpful for obtaining high signal to noise ratio in atom interferometer fringe.Development of high power Raman laser is important for cold atom interferometer experiments.The experimental realization of high power Raman lasers are demonstrated based on injection locking technique. Master laser is modulated by a 1.5 GHz acousto-optical modulator,and the±1 order diffraction lights are used as seeding Raman lasers.The seeding lasers are injection locked to two slave lasers which are further amplified as Raman beams.The frequency difference of Raman beams is 3.0 GHz,and the detuning range is about 200 MHz.

Chinese Journal of Quantum Electronics•Jan 1, 2012•0 citations

Production of raman laser beams using injection-locking technique

Sang Eon Park, Taeg Yong Kwon, H. S. Lee

We produced two Raman-laser beams with a frequency offset of 9.2-GHz using a simple injection-locking technique. A slave diode-laser is injection-locked to one f first-order sidebands of a master diode-laser produced by a 9.2 GHz EOM (electro-optic modulator). Using these Raman-laser beams, we observed CPT resonance in a cesium vapor cell.

Conference on Precision Electromagnetic Measurements•Jun 25, 2003•0 citations

Narrow-linewidth light source for a coherent Raman transfer of ultracold molecules

K. Aikawa, Jun Kobayashi, K. Oasa +3 more

We describe a tunable two-color CW light source sufficient for realizing a coherent Raman transfer between two molecular states that are more than 0.5 eV (120 THz) apart. The simultaneous frequency stabilization of 901 nm and 655 nm light was achieved by locking diode lasers to a single ultralow expansion cavity with dual wavelengths coating. By utilizing offset-locking and optical phase-locked loop (OPLL), we ensured a large mode-hop free tuning range (> 2 GHz). The obtained short term linewidth (<10 Hz) and the linear drift of frequency (65 mHz/s) were both sufficient to eliminate the influence of laser linewidths on the efficiency of coherent Raman transition.

Optics Express•Jul 13, 2011•13 citations

We describe the injection locking of two infrared (794 nm) laser diodes that are each part of a frequency-doubled laser system. An acousto-optic modulator in the injection path gives an offset of 1.6 GHz between the lasers for driving Raman transitions between states in the hyperfine split (by 3.2 GHz) ground level of 43Ca+. The offset can be disabled for use in 40Ca+. We measure the relative linewidth of the frequency-doubled beams to be 42 mHz in an optical heterodyne measurement. The use of both injection locking and frequency doubling combines spectral purity with high optical power. Our scheme is applicable for providing Raman beams across other ion species and neutral atoms where coherent optical manipulation is required.

We produced two Raman-laser beams with a frequency offset of 9.2 GHz by injection-locking of a master diode-laser to a slave diode-laser. The master laser was phase-modulated at 9.2 GHz while the laser beam passed through an electrooptic modulator. The phase-modulated beam was injected into the slave laser that was oscillating around one of the side-bands of the master laser. The relative linewidth of the two lasers was less than 10 Hz. Using these laser beams, coherent population trapping resonance of cesium atoms was observed for the purpose of testing the phase-coherence of the laser beams.

Two phase-coherent Raman laser beams with a frequency offset of 6.835 GHz were generated by sideband injection-locking technique. A master diode laser was phase-modulated at 6.835 GHz by a fiber electro-optic modulator. A slave diode was injection-locked to the -1 sideband of the phase-modulated beam, and another diode was locked to the master laser carrier. This method produced stable and spatially separated Raman lasers with a large frequency shift range (>180 MHz). The relative linewidth of these two beams was ∼1 Hz, and the unwanted carrier mode was suppressed down to -24 dB. Stimulated Raman transitions and Ramsey fringes were driven by Raman lasers in a cold atomic beam.

We produced two Raman-laser beams with a frequency offset of 6.834GHz by injection-locking of a master diode-laser to a slave diode-laser. The master laser was phase-modulated at 6.834 GHz with an Electro-Optic Modulator and then injected into the slave laser that was oscillating around one of the side-bands. The relative linewidth of the two lasers was less than 1 Hz. Utilizing these laser beams, we realized the coherent manipulation of atomic wave packets in a Mach-Zehnder type atom interferometry.

Raman pulse sequences are generally used to coherently manipulate the atomic wave packet in an atom interferometer.High power Raman beams allow more atoms join in the velocity-sensitive stimulated Raman transition,and that will be helpful for obtaining high signal to noise ratio in atom interferometer fringe.Development of high power Raman laser is important for cold atom interferometer experiments.The experimental realization of high power Raman lasers are demonstrated based on injection locking technique. Master laser is modulated by a 1.5 GHz acousto-optical modulator,and the±1 order diffraction lights are used as seeding Raman lasers.The seeding lasers are injection locked to two slave lasers which are further amplified as Raman beams.The frequency difference of Raman beams is 3.0 GHz,and the detuning range is about 200 MHz.

We describe a tunable two-color CW light source sufficient for realizing a coherent Raman transfer between two molecular states that are more than 0.5 eV (120 THz) apart. The simultaneous frequency stabilization of 901 nm and 655 nm light was achieved by locking diode lasers to a single ultralow expansion cavity with dual wavelengths coating. By utilizing offset-locking and optical phase-locked loop (OPLL), we ensured a large mode-hop free tuning range (> 2 GHz). The obtained short term linewidth (<10 Hz) and the linear drift of frequency (65 mHz/s) were both sufficient to eliminate the influence of laser linewidths on the efficiency of coherent Raman transition.