Long-external-cavity distributed Bragg reflector laser with subkilohertz intrinsic linewidth
Author(s)Lin, Qian; Van Camp, Mackenzie Anne; Zhang, Hao; Jelenkovic, Branislav; Vuletic, Vladan
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We report on a simple, compact, and robust 780 nm distributed Bragg reflector laser with subkilohertz intrinsic linewidth. An external cavity with optical path length of 3.6 m, implemented with an optical fiber, reduces the laser frequency noise by several orders of magnitude. At frequencies above 100 kHz the frequency noise spectral density is reduced by over 33 dB, resulting in an intrinsic Lorentzian linewidth of 300 Hz. The remaining low-frequency noise is easily removed by stabilization to an external reference cavity. We further characterize the influence of feedback power and current variation on the intrinsic linewidth. The system is suitable for experiments requiring a tunable laser with narrow linewidth and low high-frequency noise, such as coherent optical communication, optical clocks, and cavity QED experiments.
DepartmentMassachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Research Laboratory of Electronics; MIT-Harvard Center for Ultracold Atoms
Optical Society of America
Lin, Qian et al. “Long-external-cavity Distributed Bragg Reflector Laser with Subkilohertz Intrinsic Linewidth.” Optics Letters 37.11 (2012): 1989. © 2012 Optical Society of America
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