Accurate frequency response characterization of photoreceivers

Abstract

An accurate frequency response characterization method for photoreceivers with optical heterodyne technique is presented in this paper. The characterization is implemented with two single-mode tunable lasers operating near the wavelength of 1.55 μm. The errors introduced by extra fixtures as well as laser output fluctuations are considered and calibrated simultaneously. Compared with previous works, the proposed calibration procedures are more complete. Experimental results indicate that the significant improvement in measurement precision has been achieved with the proposed method in the frequency range from 0 to 30 GHz, which proves the proposed frequency response characterization method to be feasible and reliable.

Keywords

Beat Signal / Power Fluctuation / Frequency Response Measurement / Optical Heterodyne / Connection Fixture

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