Anritsu introduces the MN4765A optical to electrical (O/E) calibration module that transforms its Lightning 37200C/37300C vector network analyzers (VNAs) into lightwave component analyzers. A characterized, unamplified photodiode module, the MN4765A acts as an optical receiver when used with the 37200C/37300C series VNAs, which have frequency coverage up to 65 GHz. The MN4765A can be used with a Lightning VNA to conduct small-signal analysis of optoelectronic components in the frequency domain to provide data on the transfer function in terms of bandwidth, flatness, and phase linearity. Characterized at 1550 nm in both magnitude and phase to 65 GHz using a NIST traceable "golden" calibration standard, the MN4765A consists of an InGaAs photodiode that converts modulated optical signals to electrical signals, as well as some unique features to ensure high accuracy. The MN4765A is thermally stabilized to eliminate drift in the photodiode's performance over temperature. To simplify operation, an external AC adapter is included with the MN4765A. Accurate and repeatable measurements are assured in each application due to the performance of both the MN4765A and Lightning VNAs. Measurement uncertainties of < 0.5 dB at 50 GHz and < 1 dB at 65 GHz can be achieved. The VNAs have frequency stability of < 5 × 10 9 and frequency resolution of 1 Hz.
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