An advanced technology for a new generation of Cold Atom Space Clock (Pharao)

González, F.; Granier, J.P.; Laurent, Ph.

doi:10.1016/s0094-5765(00)00075-8

Cited by 2 publications

(1 citation statement)

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“…This ECDL concept has also been chosen to equip a space experiment, the PHARAO program. 8,9 For applications that require large frequency tunability ͑10 THz͒, we can use an air-spaced Fabry-Pérot cavity with a thickness inferior to 10 m. By changing the tilt angle and the ECDL cavity length, a continuous frequency tunability can be obtained.…”

Section: Discussionmentioning

confidence: 99%

Automatic system to control the operation of an extended cavity diode laser

Allard

Maksimovic

Abgrall

et al. 2004

Review of Scientific Instruments

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Automatic system to relock a laser frequency to a Fabry-Perot cavity Rev. Sci. Instrum. 76, 026101 (2005); 10.1063/1.1841811A simple system of thermal control and frequency stabilization of solitary diode lasers Rev. Sci. Instrum. 71, 3648 (2000)Control of the double pendulum optics suspension system of a 30 m triangular Fabry-Pérot cavity Rev.This article describes an automatic system that permanently keeps an extended cavity diode laser ͑ECDL͒ frequency locked to a cesium line ͑852 nm͒. The ECDL has a new architecture based on an intracavity étalon. The laser power is 30 mW and the linewidth is narrower than 50 kHz. Two acousto-optic modulators finely change the laser frequency and optical power. The electronic control is composed of a computer, microcontrollers, digital analog converters, and direct digital synthesizers. The computer searches the ECDL parameters to tune it to the Cs line and closes the servoloop. It permanently checks the servoloop and relocks the laser if necessary. Both acousto-optic modulators are driven in real time by microcontrollers. They are programed in order to control the laser power and frequency with a predefined time sequence. This system, especially developed for an atomic fountain, can be easily adapted to a wide range of applications.

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Section: Discussionmentioning

confidence: 99%