Optical channel performance monitoring module

Abstract

The invention belongs to the field of optoelectronic device manufacture, in particular to an optical channel performance monitoring module (OPM) which comprises basal units such as a collimator, an electrooptical ceramic wafer, an electrooptical probe, a voltage driver, and the like. Both sides of the electrooptical ceramic wafer are respectively plated by reflecting films to form an F-P filter, and the tunability of the F-P filter is realized by changing the refractive index of electrooptical ceramic. The refractive index of the electrooptical ceramic can be changed through changing an electric field on the electrooptical ceramic so that the transmissive wavelength of the F-P filter moves to scan the wavelengths and the power of various optical channels in the whole communication bandwidth and obtain the optical signal-to-noise ratios (OSNR) of the channels by certain algorithms and treatments. Due to the adoption of the rapidly responded electrooptical ceramic, the scanning time of the OPM reaches a sub-millisecond level, the defects of the prior OPMs of diffraction type and interference type are overcome, and the invention has the advantages of high response speed and stability, small size, simple structure, no diffraction influence and no mechanical control.

Description

【Technical field】 [0001] The invention belongs to the field of optoelectronic equipment manufacturing, and relates to an optical channel performance monitoring (OPM, optical performance monitoring) module used in an optical transmission system such as a dense wavelength division multiplexing (DWDM, dense wavelength division multiplexing) system. 【Background technique】 [0002] In a multi-channel optical network, the channel wavelength and power stability are very important. The stability of an optical channel depends largely on the performance of the optical transmitters in the network. As the laser ages and its operating temperature changes, both the wavelength and intensity of the laser light emitted by the laser are prone to change. In the DWDM network, due to the increase of optical channels and the narrowing of channel intervals, wavelength drift will cause crosstalk between adjacent channels, making optical channel wavelength drift and intensity jitter more obvious, w...

AI Technical Summary

Problems solved by technology

The disadvantage of interferometric OPM is that its core component, the tunable filter, is still difficult to achieve the bandwidth, rate and other indicators required by OPM.

Due to the serial scanning method, all signal components cannot be sampled at the same time, and the scanning speed is slow (generally requires several hundred ms), which makes it difficult to monitor the system signal in real time

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