Patent ID: 9069226
Filing Date: 2015-06-30
Classification: G02B,G02F

Abstract:
1. A thermally stabilised resonant electro-optic modulator for providing a binary modulated light signal having a wavelength, the modulated light optical signal comprising a plurality of 1-bits and a plurality of 0-bits, the modulator comprising: a resonant electro-optic modulator unit, the resonant electro-optic modulator unit comprising a first ring-shaped waveguide and a second longitudinal waveguide adjacent to the first waveguide, a voltage unit configured to apply a first voltage or a second voltage over the first ring-shaped waveguide, the first and the second waveguides being arranged such that light with the wavelength transmitted through the second waveguide is differently attenuated by resonance in the first waveguide by application of either the first or the second voltage allowing a substantially higher throughput of light with the wavelength through the second waveguide along the first waveguide at the first voltage than at the second voltage, the first voltage corresponding to one of a 0-bit or a 1-bit of the modulated optical signal, the second voltage corresponding to the other of a 0-bit and a 1-bit of the modulated optical signal, a light sensor configured to determine the intensity of the light transmitted through the second waveguide after having passed along the first waveguide, a thermal stabilisation unit configured to adjust the temperature of the first waveguide and a temperature control unit configured to control the thermal stabilisation unit in response to a signal representing the intensity measured by the light sensor, wherein the temperature control unit is configured to receive wherein the temperature control unit is configured to control the thermal stabilisation unit in response to separate changes in the first signal as a function of time and the second signal as a function of time.