Abstract

By implanting nonreciprocal phase shifts (NPS) into a ring-coupled Mach–Zehnder interferometer (RCMZI) structure, wavelength-selective isolation can be obtained over a wideband range. Different transmission lineshapes and structures of the nonreciprocal RCMZI were examined to meet the requirements of multiwavelength usage. It was demonstrated that a multiwavelength isolation with wideband and high-peak isolation could be achieved with just a reciprocal ring-coupled arm and a nonreciprocal linear arm in a MZI structure. For 5% ring loss per loop, the ring power coupling ratio $\kappa$ has a tolerance of 0.06 to keep the 30-dB isolation band wider than 0.3 $\times$ FSR. Also, an isolator over C-band was designed to verify the feasibility and discuss the wavelength-dependence issues.

© 2008 IEEE

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  2. Y. Shoji, T. Mizumoto, "Wideband design of nonreciprocal phase shift magneto-optical isolators using phase adjustment in Mach–Zehnder interferometers," Appl. Opt. 45, 7144-7150 (2006).
  3. N. Kono, K. Kakihara, K. Saitoh, M. Koshiba, "Nonreciprocal microresonators for the miniaturization of optical waveguide isolators," Opt. Exp. 15, 7737-7751 (2007).
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  9. Global Specification of Commercial Optical Isolator http://www.globalspec.com.
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  12. Y. Shoji, T. Mizumoto, H. Yokoi, I. W. Hsieh, R. M. O. Jr, "Magneto-optical isolator with silicon waveguides fabricated by direct bonding," Appl. Phys. Lett. 92, 071117 (2008).

2008 (1)

Y. Shoji, T. Mizumoto, H. Yokoi, I. W. Hsieh, R. M. O. Jr, "Magneto-optical isolator with silicon waveguides fabricated by direct bonding," Appl. Phys. Lett. 92, 071117 (2008).

2007 (1)

N. Kono, K. Kakihara, K. Saitoh, M. Koshiba, "Nonreciprocal microresonators for the miniaturization of optical waveguide isolators," Opt. Exp. 15, 7737-7751 (2007).

2006 (1)

Y. Shoji, T. Mizumoto, "Wideband design of nonreciprocal phase shift magneto-optical isolators using phase adjustment in Mach–Zehnder interferometers," Appl. Opt. 45, 7144-7150 (2006).

2004 (2)

R. L. Espinola, T. Izuhara, M. C. Tsai, R. M. Osgood, H. Dotsch, "Magneto-optical nonreciprocal phase shift in garnet/silicon-on-insulator waveguides," Opt. Lett. 29, 941-943 (2004).

H. Yokoi, Y. Shoji, T. Mizumoto, "Calculation of nonreciprocal phase shift in magneto-optic waveguide with Si guiding layer," Jpn. J. Appl. Phys. 43, 5871-5874 (2004).

2002 (1)

M. Levy, "The on-chip integration of magnetooptic waveguide isolators," J. Sel. Topics Quantum. Electron. 8, 1300-1306 (2002).

2001 (2)

M. S. Lee, I. K. Hwang, B. Y. Kim, "Bidirectional wavelength-selective optical isolator," Electron. Lett. 37, 910-912 (2001).

O. Zhuromskyy, H. Dotsch, M. Lohmeyer, L. Wilkens, P. Hertel, "Magnetooptical waveguides with polarization-independent nonreciprocal phase shift," J. Lightw. Technol. 19, 214-221 (2001).

2000 (1)

A. Yariv, "Universal relations for coupling of optical power between microresonator and dielectric waveguides," Electron. Lett. 36, 321-322 (2000).

1999 (1)

T. Sekijima, T. Fujii, K. Wakinao, M. Okada, "Optical faraday rotator using Ce-substituted fibrous YIG single crystal grown by floating-zone method with YAG laser heating," Trans. Microw. Theory Tech. 47, 2294-2298 (1999).

Appl. Opt. (1)

Y. Shoji, T. Mizumoto, "Wideband design of nonreciprocal phase shift magneto-optical isolators using phase adjustment in Mach–Zehnder interferometers," Appl. Opt. 45, 7144-7150 (2006).

Appl. Phys. Lett. (1)

Y. Shoji, T. Mizumoto, H. Yokoi, I. W. Hsieh, R. M. O. Jr, "Magneto-optical isolator with silicon waveguides fabricated by direct bonding," Appl. Phys. Lett. 92, 071117 (2008).

Electron. Lett. (1)

A. Yariv, "Universal relations for coupling of optical power between microresonator and dielectric waveguides," Electron. Lett. 36, 321-322 (2000).

Electron. Lett. (1)

M. S. Lee, I. K. Hwang, B. Y. Kim, "Bidirectional wavelength-selective optical isolator," Electron. Lett. 37, 910-912 (2001).

J. Lightw. Technol. (1)

O. Zhuromskyy, H. Dotsch, M. Lohmeyer, L. Wilkens, P. Hertel, "Magnetooptical waveguides with polarization-independent nonreciprocal phase shift," J. Lightw. Technol. 19, 214-221 (2001).

J. Sel. Topics Quantum. Electron. (1)

M. Levy, "The on-chip integration of magnetooptic waveguide isolators," J. Sel. Topics Quantum. Electron. 8, 1300-1306 (2002).

Jpn. J. Appl. Phys. (1)

H. Yokoi, Y. Shoji, T. Mizumoto, "Calculation of nonreciprocal phase shift in magneto-optic waveguide with Si guiding layer," Jpn. J. Appl. Phys. 43, 5871-5874 (2004).

Opt. Exp. (1)

N. Kono, K. Kakihara, K. Saitoh, M. Koshiba, "Nonreciprocal microresonators for the miniaturization of optical waveguide isolators," Opt. Exp. 15, 7737-7751 (2007).

Opt. Lett. (1)

Trans. Microw. Theory Tech. (1)

T. Sekijima, T. Fujii, K. Wakinao, M. Okada, "Optical faraday rotator using Ce-substituted fibrous YIG single crystal grown by floating-zone method with YAG laser heating," Trans. Microw. Theory Tech. 47, 2294-2298 (1999).

Other (2)

Global Specification of Commercial Optical Isolator http://www.globalspec.com.

C. Madsen, J. Zhao, Optical Filter Design and Analysis: A Signal Processing Approach (Wiley, 1999).

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