Masashi Ishige et al 2009 Meas. Sci. Technol. 20 084019 doi:10.1088/0957-0233/20/8/084019
Measurement of air-refractive-index fluctuation from frequency change using a phase modulation homodyne interferometer and an external cavity laser diode
Masashi Ishige, Masato Aketagawa1, Tuan Banh Quoc and Yuta Hoshino
Show affiliationsWe present a method for air-refractive-index (nair) fluctuation measurement using a laser interferometer. The method is based on a combination of a phase modulation homodyne interferometer (PMHI), an external cavity laser diode (ECLD) and an ultralow thermal expansion material (ULTEM). The PMHI utilizes a Michelson interferometer which is constructed on the ULTEM plate under the condition of an air temperature fluctuation of less than 10 mK, so that the optical path change or the air-refractive-index fluctuation (Δnair) caused by the thermal disturbance can be neglected. Meanwhile, the ECLD is controlled by adjusting its frequency to track some of the dark fringes of the interferometer, so that Δnair can be derived from the ECLD frequency change. The uncertainty of the Δnair measurement in the experiment is of 10−8 order. However, it will be possible to decrease the uncertainty to 10−9 or less if the signal-to-noise ratio (SNR) of the control system is improved.
- PACS
-
07.60.Hv Refractometers and reflectometers
- Subjects
- Dates
-
Issue 8 (August 2009)
Received 27 November 2008, in final form 24 March 2009
Published 30 June 2009
-
Measurement of air-refractive-index fluctuation from frequency change using a phase modulation homodyne interferometer and an external cavity laser diode
Masashi Ishige et al 2009 Meas. Sci. Technol. 20 084019
-
Towards a closed differential aging formula in special relativity
E Minguzzi 2007 J. Phys.: Conf. Ser. 66 012020
-
On dead-time corrections for estimating rates
R Willink 2010 Meas. Sci. Technol. 21 015101
-
Particle and antiparticle sectors in DSR1 and κ-Minkowski space-time
Roberto Aloisio et al JHEP05(2004)028
-
Construction of SU(3) irreps in canonical SO(3)-coupled bases
D J Rowe and G Thiamova 2008 J. Phys. A: Math. Theor. 41 065206
-
Holographic nuclei: supersymmetric examples
Koji Hashimoto JHEP12(2009)065
-
N orientifolds with flux
Anamaría Font JHEP11(2004)077
-
Orbital ordering and magnetic interactions in BiMnO3
I V Solovyev and Z V Pchelkina 2008 New J. Phys. 10 073021
-
On a class of embeddings of massive Yang-Mills theory
Andrea Quadri JHEP12(2003)018
-
A novel microactuator for microbiopsy in capsular endoscopes
Sunkil Park et al 2008 J. Micromech. Microeng. 18 025032
Users also read
What's this?- Void fraction measurement in two-phase flow processes via symbolic dynamic filtering of ultrasonic signals
- A simple self-restored fiber Bragg grating (FBG)-based passive sensing ring network
- A multiple-segment long-distance microscope for flow visualization and measurements
Related review articles
What's this?- Imaging with LINC-NIRVANA, the Fizeau interferometer of the Large Binocular Telescope: state of the art and open problems
- Polymer optical fiber sensors—a review
- Photometry, radiometry and 'the candela': evolution in the classical and quantum world