Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

European Frequency and Time Forum

The raman laser system for Mach-Zehnder atom interferometry

Nan Li, Kaikai Huang, Xuanhui Lu

Published Apr 1, 2016• 0 citations
Publisher

Abstract

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.

DOI
10.1109/eftf.2016.7477768

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

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

A phase-modulated laser system of ultra-low phase noise for compact atom interferometers

Ki-Se Lee, Jaewan Kim, Sang-Bum Lee +2 more

A compact and robust laser system is essential for mobile atom interferometers. Phase modulation can provide the two necessary phase-coherent frequencies without sophisticated phase-locking between two different lasers. However, the additional laser frequencies generated can perturb the atom interferometer. In this article, we report on a novel method to produce a single high-power laser beam composed of two phase-coherent sidebands without the perturbing carrier mode. Light from a diode laser is phase-modulated by using a fiber-coupled electro-optic modulator driven at 3.4 GHz and passes through a Fabry-Perot cavity with a 6.8 GHz free spectral range. The cavity filters the carrier mode to leave the two first-order sidebands for the two-photon Raman transition between the two hyperfine ground states of 87 Rb. The laser beam is then fed to a single tapered amplifier, and the two sidebands are both amplified without mode competition. The phase noise is lower than that of a state-of-the-art optically phase-locked external-cavity diode laser (−135 dBrad 2 /Hz at 10 kHz) at frequencies above 10 Hz. This technique can be used in all-fiber-based laser systems for future mobile atom interferometers.

Journal of the Korean Physical Society•Jul 1, 2015•13 citations

GHz-scale rapid frequency-hopping laser system for atom interferometry

Rui Han, Wei Li, Xiaobin Xu +4 more

We demonstrate a dual-laser architecture capable of GHz-scale rapid frequency hopping for atom interferometers (AIs). The system integrates two phase-locked fixed-external-cavity diode lasers: a reference laser stabilized to Rubidium 87 D 2 transition and a slave laser phase-locked to the reference via an optical phase-lock loop. This configuration achieves rapid frequency hopping of 1.1 GHz in 65 µs without unlock-and-relock process. Validated through Raman spectroscopy and optical depth measurements in a fiber-guided AI, the laser system provides a potential solution for developing miniaturized portable AIs.

Optics Letters•Apr 22, 2025•1 citation
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.
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.
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.
A compact and robust laser system is essential for mobile atom interferometers. Phase modulation can provide the two necessary phase-coherent frequencies without sophisticated phase-locking between two different lasers. However, the additional laser frequencies generated can perturb the atom interferometer. In this article, we report on a novel method to produce a single high-power laser beam composed of two phase-coherent sidebands without the perturbing carrier mode. Light from a diode laser is phase-modulated by using a fiber-coupled electro-optic modulator driven at 3.4 GHz and passes through a Fabry-Perot cavity with a 6.8 GHz free spectral range. The cavity filters the carrier mode to leave the two first-order sidebands for the two-photon Raman transition between the two hyperfine ground states of 87 Rb. The laser beam is then fed to a single tapered amplifier, and the two sidebands are both amplified without mode competition. The phase noise is lower than that of a state-of-the-art optically phase-locked external-cavity diode laser (−135 dBrad 2 /Hz at 10 kHz) at frequencies above 10 Hz. This technique can be used in all-fiber-based laser systems for future mobile atom interferometers.
We demonstrate a dual-laser architecture capable of GHz-scale rapid frequency hopping for atom interferometers (AIs). The system integrates two phase-locked fixed-external-cavity diode lasers: a reference laser stabilized to Rubidium 87 D 2 transition and a slave laser phase-locked to the reference via an optical phase-lock loop. This configuration achieves rapid frequency hopping of 1.1 GHz in 65 µs without unlock-and-relock process. Validated through Raman spectroscopy and optical depth measurements in a fiber-guided AI, the laser system provides a potential solution for developing miniaturized portable AIs.