The invention discloses a method for extrapolating and testing the sensitivity of a receiving optical device, which can quickly and accurately find the specific value of the sensitivity of the receiving optical device under the condition that the error rate is. The invention discloses a method for extrapolating and testing the sensitivity of a receiving optical device, which can quickly and accurately find the specific value of the sensitivity of the receiving optical device under the condition that the error rate is. The invention discloses a method for extrapolating and testing the sensitivity of a receiving optical device, which can quickly and accurately find the specific value of the sensitivity of the receiving optical device under the condition that the error rate is 1. 0E-10 orders of magnitude by. This paper introduces the influence of TIA on the sensitivity of ROSA component of 25G SR SFP28 optical module. Theoretical analysis and experimental comparison are used to analyze PIN-TIA and AGC circuits and overload characteristics, and the problem of interval error of optical module is analyzed. In optical communication systems, sensitivity is a measure of how weak an input signal can get before the bit-error ratio (BER) exceeds some specified number. The standards body governing the application sets this specified BER. **Bit Error Ratio (BER) and Q Factor**: BER is critical for system performance, with a target of 10⁻¹² for. Receiver sensitivity refers to the minimum average input optical power that the receiver component of the optical module can receive under a certain bit error rate (BER=10-12) condition. If the transmitted optical power refers to the intensity of light emitted by the transmitter, then the receiver.
