Method and device for determining sensitivity of light receiver

Abstract

The invention discloses a method and device for determining the sensitivity of a light receiver. The method comprises the steps that the current bit error rate of the measured light receiver is judged; if the current bit error rate is smaller than a set value, an estimated sensitivity value corresponding to the current bit error rate is determined according to the predetermined corresponding relationship between the bit error rate of the measured light receiver and the estimated sensitivity value, a sensitivity noise compensation value of the current bit error rate is determined, and the sensitivity of the measured light receiver with the current bit error rate is determined according to the determined estimated sensitivity value and the determined sensitivity noise compensation value. Because the effect of noises of the light receiver on the sensitivity is taken into consideration when the sensitivity of the bit error rate smaller than the set value is determined, the determined sensitivity of the light receiver is closer to the actual sensitivity and is more accurately determined.

Description

Technical field [0001] The present invention relates to the field of optical communication technology, in particular to a method and device for determining the sensitivity of an optical receiver. Background technique [0002] In the optical communication system, due to the presence of noise, the symbols received by the optical receiver may be misjudged, and the probability of the symbol misjudged by the optical receiver is called the bit error rate. Correspondingly, the sensitivity of the optical receiver is the minimum optical power that the optical receiver needs to receive under the condition of ensuring a certain bit error rate. [0003] At present, the method for measuring the sensitivity of the optical receiver may be: when a certain bit error rate is detected, the received optical power of the optical receiver under test at this time is measured, and the received optical power is used as the sensitivity corresponding to the bit error rate. However, when measuring the sensit...

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Problems solved by technology

[0005] However, the inventors of the present invention have found that the smaller the bit error rate, the greater the received optical power of the optical receiver; the greater the received optical power of the optical receiver, the greater the impact of the noise of the optical receiver on the sensitivity; like this, Compared with the sensitivity value corresponding to the smaller bit error rate determined by the extrapolation method in the prior art, there is a large error compared with the sensitivity value corresponding to the smaller bit error rate obtained by actual measurement, resulting in the determined The sensitivity of the optical receiver is not accurate enough

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