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Journal of the Physical Society of Japan

A Stabilized Michelson Interferometer for Active Phase Locking of Nanosecond Pulse Pair

Jun Miyazaki, Shuichi Kinoshita

Published Jul 26, 2010• 1 citation
Publisher

Abstract

An actively stabilized Michelson interferometer with a long optical-path-length difference is developed to generate a phase-locked pulse pair on the order of nanoseconds. A rigid frame and a piezoelectric feedback loop enable us to stabilize an interferometer to the optical-path-length difference of up to 5.8 m within λ/20 for 1 h. It is demonstrated that this interferometer is useful for generating a phase-tunable pulse pair up to an interval of 19 ns, which opens new possibilities for measuring the long-time coherence in the nanosecond region in the field of coherent control spectroscopy.

DOI
10.1143/jpsj.79.084301

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An actively stabilized Michelson interferometer with a long optical-path-length difference is developed to generate a phase-locked pulse pair on the order of nanoseconds. A rigid frame and a piezoelectric feedback loop enable us to stabilize an interferometer to the optical-path-length difference of up to 5.8 m within λ/20 for 1 h. It is demonstrated that this interferometer is useful for generating a phase-tunable pulse pair up to an interval of 19 ns, which opens new possibilities for measuring the long-time coherence in the nanosecond region in the field of coherent control spectroscopy.
We developed a high resolution Michelson interferometer with a two-frequency He-Ne laser positioning system in order to stabilize the relative phase of a pulse pair. The control resolution corresponded to a 12 as time resolution or a phase of 1.5 degrees at 900 nm. This high resolution Michelson interferometer can generate a phase-locked pulse pair either with a specific relative phase such as 0 or pi radians or with an arbitrary phase. Coherent control of an InAs self-assembled quantum dot was demonstrated using the high resolution Michelson interferometer with a microspectroscopy system.
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A Michelson-type interferometer is built to dynamically lock the optical phase difference between the two-arm laser beams. The phase difference is tunable and allowed for continuous adjustments nearly by 160°. Under the best locking condition, a relative phase stability better than 0.1° is achieved starting from the original phase jitter of 10 to 15°. The interferometer is made by simply adding a pair of Brewster windows in one arm of the conventional setup, yet it provides much robust phase locking. It is readily applicable for optical lattice construction and nondestructive phase contrast imaging of ultracold atoms.
We put forward two methods for phase stabilization in the all-fiber Michelson interferometer. To perform passive phase stabilization, we use a heat bath for all fibers and electro-optical components, and put the interferometer in a hermetic case. To perform active phase stabilization, we monitor output power of the interferometer and develop an electronic feedback control. The phase stabilization methods enable stable interference pattern for several minutes, and can be helpful for the development of the optimal quantum receiver for coherent signals.
Abstract We developed a high‐resolution Michelson interferometer in order to stabilize the relative phase of double pulses by using a He‐Ne two‐frequency laser positioning system. A very stable phase‐locked pulse pair whose phase difference was only 4° at 900 nm was realized. Using a high‐resolution Michelson interferometer, we demonstrated coherent control of an exciton in a GaAs/AlGaAs crescent‐shaped quantum wire. The dephasing time of the single quantum wire was 400 fs. © 2011 Wiley Periodicals, Inc. Electron Comm Jpn, 94(5): 25–32, 2011; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/ecj.10238