Patent ID: 8866058
Filing Date: 2014-10-21
Classification: G01C,H04B

Abstract:
1. An optical transceiver comprising: a light source which can be controlled by a driver current and emits light, which is radiated by the optical transceiver; a wavelength stabilization unit for stabilizing the wavelength of the light emitted by the light source, comprising: a sensor device for detecting a wavelength drift; a control unit connected to the sensor device and the light source for controlling the driver current as a function of the sensor signals so as to counteract a drift of the wavelength, wherein the wavelength stabilization unit comprises a wavelength sensor for determining a central wavelength of the emitted light and a regulating circuit for compensating for a wavelength drift of the emitted light, the wavelength sensor comprises two photodiodes of different spectral sensitivity; characterized in that the optical transceiver comprises a detector for measuring light received by the optical transceiver, an amplifier for amplifying an electrical output signal of the detector with a switchable gain, and a control circuit which is suitable for controlling the gain as a function of a sum signal of output signals of the two photodiodes.