Optical device, tunable laser and method for realizing tunable laser

Abstract

An existing tunable laser is high in cost. The invention provides an optical device, a tunable laser and a method for achieving the tunable laser. The optical device comprises a first port (1), a second port (4), a coupler (2) and a micro ring (3), the first port (1) is used for receiving multi-longitudinal-mode optical signals, the second port (4) is used for outputting the optical signals of a selected longitudinal mode, the coupler (2) is connected to the first port and the micro ring (3) and used for providing the multi-longitudinal-mode optical signals for the micro ring, the resonant frequency of the micro ring (3) is matched with the selected longitudinal mode to select the optical signals of the selected longitudinal mode out of the multi-longitudinal-mode optical signals, and the optical signals of the selected longitudinal mode are provided back to the coupler. The coupler provides the optical signals of the selected longitudinal mode for the second port to be output. Preferably, a temperature control component (5) is further included, the temperature control component (5) is coupled to the micro ring and used for controlling the temperature of the micro ring so as to adjust the resonant frequency of the micro ring to be matched with any longitudinal mode in the multi-longitudinal-mode optical signals.

Description

technical field [0001] The invention relates to optical communication technology, in particular to an adjustable laser in the optical communication technology. Background technique [0002] At present, although GPON (Gigabit Passive Optical Network) and EPON (Ethernet Passive Optical Network) have been deployed, and the standardization of 10G Passive Optical Network (XGPON) has also been completed, the growth trend of bandwidth consumption is still increasing rapidly , due to increased data traffic and demand for higher quality video. According to the operator's requirements in the next generation PON2 (NGPON2) white paper, within a few years, the bandwidth demand is expected to exceed 250Mbit / s. Therefore, this increase in bandwidth may cause a bottleneck in the current GPON deployment. Even the standardized XGPON technology cannot meet this continuously increasing bandwidth consumption. Therefore, an optical access technology with 40Gbit / s capability and a large number o...

AI Technical Summary

Problems solved by technology

In TDWM-PON, the bit rate of a single wavelength must support 2.5G-10Gbit / s, therefore, the directly modulated dimmer scheme may suffer from serious chirp problem, which deteriorates the signal quality and shortens the transmission time. distance

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