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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 13 — Jul. 1, 2014
  • pp: 3923–3926

Miniature Fourier transform spectrometer based on wavelength dependence of half-wave voltage of a LiNbO3 waveguide interferometer

Jinyang Li, Dan-feng Lu, and Zhi-mei Qi  »View Author Affiliations


Optics Letters, Vol. 39, Issue 13, pp. 3923-3926 (2014)
http://dx.doi.org/10.1364/OL.39.003923


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Abstract

A simple and reliable spectrum-retrieval method was proposed for the development of miniature stationary Fourier transform (FT) spectrometers based on a LiNbO3 (LN) waveguide Mach–Zehnder interferometer (MZI) modulator. The method takes into account the wavelength dependence of the optical pathlength difference (OPD) and allows us to use a nonlinear voltage ramp to modulate the OPD. The method is based on the dispersion of the half-wave voltage, which was measured to be a monotonous polynomial function of the wavelength for the LN waveguide MZI used. With the measured dispersion of the half-wave voltage, the OPD, as a linear function of the modulating voltage, can be accurately determined at each wavelength in the near-infrared region in which the MZI used is a single-mode device. A prototype FT spectrometer was prepared using a LN waveguide MZI modulator based on the above method. The experimental results demonstrated that the spectrometer can be used for accurate determination of the laser wavelength and for liquid absorptiometry.

© 2014 Optical Society of America

OCIS Codes
(070.0070) Fourier optics and signal processing : Fourier optics and signal processing
(130.3730) Integrated optics : Lithium niobate
(250.7360) Optoelectronics : Waveguide modulators

ToC Category:
Optoelectronics

History
Original Manuscript: April 16, 2014
Revised Manuscript: May 28, 2014
Manuscript Accepted: May 28, 2014
Published: June 25, 2014

Citation
Jinyang Li, Dan-feng Lu, and Zhi-mei Qi, "Miniature Fourier transform spectrometer based on wavelength dependence of half-wave voltage of a LiNbO3 waveguide interferometer," Opt. Lett. 39, 3923-3926 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-13-3923

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