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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 9 — May. 1, 2006
  • pp: 4092–4100

Two-dimensional optical beam deflector operated by wavelength tuning

Morio Toyoshima, Franz Fidler, Martin Pfennigbauer, and Walter R. Leeb  »View Author Affiliations

Optics Express, Vol. 14, Issue 9, pp. 4092-4100 (2006)

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A new method based on an optical delay line structure is proposed for two-dimensional raster optical beam steering. For one-dimensional beam steering, the laser beam to be deflected is split into N co-directional sub-beams of equal intensity with the aid of a plane-parallel plate. These sub-beams experience a relative time delay, which translates into a phase difference, thus forming a phased array. When the laser wavelength is tuned, the relative phase varies and the far-field interference footprint can be steered across a receive plane. By employing two plane-parallel plates in series, the described scheme can be extended to produce a two-dimensional N × N array of sub-beams, allowing two-dimensional beam steering via wavelength tuning. In this case, wavelength tuning over a larger range leads to a linear deflection which repeats itself in a raster-like fashion. One direction of deflection repeats itself multiple times as wavelength is scanned over larger range, that is, a raster effect. In this paper, the principle is theoretically derived and formulated, and the preliminary experimental results with four sub-beams are presented.

© 2006 Optical Society of America

OCIS Codes
(010.3310) Atmospheric and oceanic optics : Laser beam transmission
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(060.4510) Fiber optics and optical communications : Optical communications
(110.5100) Imaging systems : Phased-array imaging systems

ToC Category:
Optical Devices

Original Manuscript: February 27, 2006
Revised Manuscript: April 14, 2006
Manuscript Accepted: April 21, 2006
Published: May 1, 2006

Morio Toyoshima, Franz Fidler, Martin Pfennigbauer, and Walter R. Leeb, "Two-dimensional optical beam deflector operated by wavelength tuning," Opt. Express 14, 4092-4100 (2006)

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