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Proceedings Paper

Simple rubidium stabilized diode laser for gauge block interferometer
Author(s): Youichi Bitou; Hajime Inaba; Atsushi Onae
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Paper Abstract

A simple rubidium stabilized diode laser has been developed for a gauge block interferometer. The laser light source is a commercially available external-cavity tunable diode laser (New Focus Inc.). Laser frequency stabilization is realized by the third-harmonic technique, where a fast frequency modulation (10 kHz) is applied on the current. The absolute laser frequency was calibrated by an absolute optical frequency measurement system using a femtosecond mode-locked laser. The relative uncertainty of the laser frequency reached 4.3×10-10 for an averaging time of 0.01 s. The phase error in the interferometeric measurement due to the optical frequency modulation is theoretically indicated to be small enough to measure long gauge blocks of up to 1000 mm. Long gauge block measurement of up to 1000 mm was successfully demonstrated using the developed rubidium stabilized diode laser and the I2-stabilized offset locked He-Ne laser (633 nm).

Paper Details

Date Published: 20 November 2003
PDF: 8 pages
Proc. SPIE 5190, Recent Developments in Traceable Dimensional Measurements II, (20 November 2003); doi: 10.1117/12.504025
Show Author Affiliations
Youichi Bitou, National Institute of Advanced Industrial Science and Technology (Japan)
Hajime Inaba, National Institute of Advanced Industrial Science and Technology (Japan)
Atsushi Onae, National Institute of Advanced Industrial Science and Technology (Japan)


Published in SPIE Proceedings Vol. 5190:
Recent Developments in Traceable Dimensional Measurements II
Jennifer E. Decker; Nicholas Brown, Editor(s)

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