论文信息 - Novel nonmagnetic 30-dB traveling-wave single-sideband optical isolator integrated in III/V material

Novel nonmagnetic 30-dB traveling-wave single-sideband optical isolator integrated in III/V material

Various attempts have been made to fabricate waveguide-type isolators in III/V material by implanting magnetic materials, but none of them has so far resulted in a commercial product. Here, we report for first time on an integrated optical isolator implemented in III/V material. It consists of a single-sideband electrooptic modulator where traveling electrical waves make the transmission direction-dependent. Isolation is 30 dB, excess insertion loss is 8 dB. Residual rms ripple is 7% for peak-to-peak RF driving amplitudes of 3.5 V at 4.0 GHz. The estimated transmission penalty for 40 Gb/s return-to-zero differential phase shift keying (RZ-DPSK) signals is 0.2 dB (0 dB measured).

[1] Robert A. Griffin,et al. Optical differential quadrature phase-shift key (oDQPSK) for high capacity optical transmission , 2002, Optical Fiber Communication Conference and Exhibit.

[2] Yasuyuki Inoue,et al. A hybrid integrated waveguide isolator on a silica-based planar lightwave circuit , 1996 .

[3] R. Osgood,et al. Integration of magnetooptical waveguides onto a III-V semiconductor surface , 2002, IEEE Photonics Technology Letters.

[4] O. Zhuromskyy,et al. Magnetooptical waveguides with polarization-independent nonreciprocal phase shift , 2001 .

[5] Michael J. Steel,et al. Flat-top response in one-dimensional magnetic photonic bandgap structures with Faraday rotation enhancement , 2001 .

[6] J. Abeles,et al. Polycrystalline-metal-ferromagnetic optical waveguide isolator (POWI) for monolithic-integration with diode-laser devices , 1997, IEEE Photonics Technology Letters.

[7] G. Evans,et al. Isolators, polarizers, and other optical waveguide devices using a resonant-layer effect , 2004, Journal of Lightwave Technology.

[8] Miguel Levy,et al. The on-chip integration of magnetooptic waveguide isolators , 2002 .

[9] K. Ando,et al. Optical waveguide isolator based on nonreciprocal loss/gain of amplifier covered by ferromagnetic layer , 1999, IEEE Photonics Technology Letters.