A new wideband integrated optical frequency shifter that utilizes noncollinear guidedhyphen;wave magnetohyphen;optic (MO) Bragg diffraction from magnetostatichyphen;forwardhyphen;volume waves (MSFVW) in a bismuthhyphen;doped yttriumhyphen;ironhyphen;garnet/gadoliniumhyphen;galliumhyphen;garnet (YIG/GGG) waveguide, 6times;10 mm2in size, is reported. Constancy in the output angle of the frequencyhyphen;shifted light beam, irrespective of the amount of frequency shift, is facilitated by synchronous tuning of the carrier frequency of the MSFVW and the bias magnetic field using an electronic synchronizer. The device operating at the optical wavelength of 1.302 mgr;m and the carrier frequency centered atXband has demonstrated desirable characteristics including large frequency shift, very large tunable bandwidth, large dynamic range, and fast tuning speed. Specifically, bandwidths of 1.61 and 2.35 GHz and dynamic ranges of 35 and 32 dB at the center carrier frequencies of 6.035 and 11.025 GHz, respectively, and a tuning speed of 50 mgr;s have been accomplished.
展开▼
