Injection locking of Raman laser beams in cold atom interferometers

Abstract

Abstract:

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. In this paper, we demonstrated the experimental realization of high power Raman lasers based on injection locking technique. Master laser is modulated by a 1.5 GHz acousto-optic 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 the Raman beams is 3.0 GHz, and the detuning range is about 200 MHz.

Key words: laser technology, Raman laser, injection locking, atom interferometer

CLC Number:

TN248

Wang Ling, Yao Zhanwei, Xiong Zongyuan, Li Runbing, Wang Jin, Zhan Mingsheng. Injection locking of Raman laser beams in cold atom interferometers[J]. J4, 2012, 29(1): 27-31.

References

[1] Peters A, Chung K Y, Chu S. Measurement of gravitational acceleration by dropping atoms [J]. Nature, 1999, 400(6747):849-852
[2] McGuirk J M, Foster G T, Fixler J B, et al. Sensitive absolute-gravity gradiometry using atom interferometry [J]. Phys. Rev. A, 2002, 65(3):33608
[3] Fixler J B, Foster G T, McGuirk J M, et al. Atom interferometer measurement of the newtonian constant of gravity [J]. Science, 2007, 315(5808):74-77
[4] Bertoldi A, Lamporesi G, Cacciapuoti L, et al. Atom interferometry gravity- gradiometer for the determination of the Newtonian gravitational constant G [J]. Euro. Phys. J. D., 2006, 40(2):271-279
[5] Lamporesi G, Bertoldi A, Cacciapuoti L, et al. Determination of the newtonian gravitational constant using atom interferometry [J]. Phys. Rev. Lett., 2008, 100(5): 050801
[6] Gustavson T L, Landragin A, Kasevich M A. Rotation sensing with a dual atom-interferometer Sagnacgyroscope [J]. Class. Quantum Grav.，2000,17(12):2385- 2398
[7] Canuel B, Leduc F, Holleville D, et al. Six-axis inertial sensor using cold-atom interferometry [J]. Phys. Rev. Lett., 2006, 97(1):010402
[8] Durfee D S, Shaham Y K, Kasevich M A. Long-term stability of an area-reversible atom-interferometer sagnac gyroscope [J]. Phys. Rev. Lett., 2006, 97(24):240801
[9] Weiss D S, Young B C, Chu S. Precision-measurement of h/m(cs) based on photon recoil using laser-cooled atoms and atomic interferometry [J]. Appl. Phys. B, 1994, 59(3):217-256
[10] Kasevish M A, Chu S. Measurement of the gravitational acceleration of an atom with a light-pulse atom interferometer [J]. Appl. Phys. B, 1992,54(5):321-332
[11] Arlt J, Birkl G, Rasel E, et al. Atom optics, guided atoms, and atom interferometry [J]. Adv. At. Mol. Opt. Phys, 2005, 50:55-89
[12] Bouyer P, Gustavson T L, et al. Microwave signal generation with optical injection locking [J]. Opt. Lett., 1996, 21 (18):1502-1504
[13] Kasevich M A, Chu S. Atomic interferometry using stimulated Raman transitions [J]. Phys. Rev. Lett., 1991, 67(2):181-184
[14] Stover H L, Steier W H. Locking of laser oscillators by light injection [J]. Appl. Phys. Lett., 1966, 8:91-93
[15] Girard A. The effects of the insertion of a CW, low-pressure CO2 laser into a TEA CO2 laser cavity [J]. Opt. Commun., 1974, 11(4): 346-351
[16] Lachambre J L, Lavigne P, Otis G, Noe M. Injection locking and mode selection in TEA-CO2 laser oscillators [J]. IEEE Electron, 1976, 12(12):756-764
[17] Lang R. Injection locking properties of a semiconductor laser [J]. IEEE J. Quantum Electron, 1982, 18(6):976-983
[18] Wang X, Chen X, et al. Theoretic and experiment study on large frequency different side-mode injection locking of high power semiconductor lasers for laser cooling [J]. Chin. Phys. Soc.(物理学报), 2000, 49(1):86-92(in Chinese）
[19] Chen W, Qi X, et al. Optical phase locking with a large and tunable frequency difference based on a vertical-cavity surface-emitting laser [J]. Opt. Lett., 2008, 33(4):357-359
[20] Chen L, Xiong Z, et al. Tapered amplified diode laser injected by distributed feedback laser [J]. Chin. J. Quantum Electronics（量子电子学报），2010, 27(1):15-20(in Chinese）
[21] Li R, Zhou L, et al. Measurement of the quadratic Zeeman shift of 85Rb hyperfine sublevels using stimulated Raman transitions [J]. Opt. Commun., 2009, 282(7):1340-1344