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Optics Letters

Optics Letters


  • Vol. 29, Iss. 5 — Mar. 1, 2004
  • pp: 454–456

Mach-Zehnder interferometer with a uniform wavelength period

Takayuki Mizuno, Tsutomu Kitoh, Manabu Oguma, Yasuyuki Inoue, Tomohiro Shibata, and Hiroshi Takahashi  »View Author Affiliations

Optics Letters, Vol. 29, Issue 5, pp. 454-456 (2004)

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We have realized a first optical filter composed of optical delay lines and couplers that has a periodic response with respect to wavelength, whereas a conventional optical filter is known to have a periodic response to relative optical frequency. This new filter can be constructed by using a phase-generating coupler (PGC) that supplies the optical delay lines with a wavelength-dependent nonlinear phase. The PGC, which is also composed of optical delay lines and couplers, can simultaneously provide a desired phase and an arbitrary amplitude coupling ratio. We applied our transformation method to a conventional Mach–Zehnder interferometer (MZI) as an example of an optical frequency filter and converted it to an optical wavelength filter. We fabricated the designed MZI on a silica-based planar lightwave circuit and successfully realized what is believed to be the first MZI with a uniform wavelength period.

© 2004 Optical Society of America

OCIS Codes
(060.4510) Fiber optics and optical communications : Optical communications
(070.2590) Fourier optics and signal processing : ABCD transforms
(070.6020) Fourier optics and signal processing : Continuous optical signal processing
(130.3120) Integrated optics : Integrated optics devices
(230.7390) Optical devices : Waveguides, planar
(250.5300) Optoelectronics : Photonic integrated circuits

Takayuki Mizuno, Tsutomu Kitoh, Manabu Oguma, Yasuyuki Inoue, Tomohiro Shibata, and Hiroshi Takahashi, "Mach-Zehnder interferometer with a uniform wavelength period," Opt. Lett. 29, 454-456 (2004)

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