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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 15 — May. 20, 2003
  • pp: 2730–2738

Synthesis of Hadamard transformers by use of multimode interference optical waveguides

Atma Ram Gupta, Kiyoshi Tsutsumi, and Junichi Nakayama  »View Author Affiliations


Applied Optics, Vol. 42, Issue 15, pp. 2730-2738 (2003)
http://dx.doi.org/10.1364/AO.42.002730


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Abstract

We propose a synthesis method of optical Hadamard transformers using multimode interference (MMI) couplers. By using the signal transfer matrix of 2 × 2, 4 × 4, and 8 × 8 MMI couplers, we show that sum and difference units of input signals can be synthesized. An interchange unit of two signals can also be synthesized. One synthesis method of Hadamard transformers is a combination of only 2 × 2 units, and the other is a combination of N × N(N ≥ 4) units as well as 2 × 2 units. The design examples of operation units are shown, and the size and the output power of Hadamard transformers are estimated.

© 2003 Optical Society of America

OCIS Codes
(070.1170) Fourier optics and signal processing : Analog optical signal processing
(130.3120) Integrated optics : Integrated optics devices
(230.3120) Optical devices : Integrated optics devices
(230.7370) Optical devices : Waveguides
(250.5300) Optoelectronics : Photonic integrated circuits

History
Original Manuscript: April 19, 2002
Revised Manuscript: November 26, 2002
Published: May 20, 2003

Citation
Atma Ram Gupta, Kiyoshi Tsutsumi, and Junichi Nakayama, "Synthesis of Hadamard transformers by use of multimode interference optical waveguides," Appl. Opt. 42, 2730-2738 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-15-2730


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