Ultrafast broadband tunable-bandwidth magneto-optic modulator

Gavin D. Jones; Abdulhakem Y. Elezzabi

doi:10.1117/12.370158

12 November 1999 Ultrafast broadband tunable-bandwidth magneto-optic modulator

Gavin D. Jones, Abdulhakem Y. Elezzabi

Proceedings Volume 3795, Terahertz and Gigahertz Photonics; (1999) https://doi.org/10.1117/12.370158
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

We present our investigation of a variable bandwidth, ultrafast magneto-optic waveguide modulator employing the ferromagnetic resonant precession of the magnetization in a Bizmuth-substituted YIG film. Ultrafast magnetic field pulses, produced by current pulses propagated through a high-speed transmission line, are used to modulate the optical beam in the film. Such a device is capable of multi- gigahertz bandwidth and potential integration into current IC technology. Single frequency modulation of an 800 nm optical carrier is measured at bandwidths tuned between 4.6 and 11.7 GHz. The bandwidth is tuned by means of an externally applied DC magnetic field. It is found that the mode conversion efficiency of a waveguide type of device is limited by the linear birefringence of the thin Bi-YIG film. Birefringence-compensating schemes are discussed to optimize the mode conversion.

Citation Download Citation

Gavin D. Jones and Abdulhakem Y. Elezzabi "Ultrafast broadband tunable-bandwidth magneto-optic modulator", Proc. SPIE 3795, Terahertz and Gigahertz Photonics, (12 November 1999); https://doi.org/10.1117/12.370158

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