Microwave photonics instantaneous frequency measurement receiver based on a Sagnac Loop: publisher's note.

This publisher's note amends the author listing in Opt. Lett.43, 2233 (2018).

Microwave photonics instantaneous frequency measurement receiver based on a Sagnac loop.

A microwave photonics instantaneous frequency measurement receiver was conceived and practically demonstrated. The system is based on phase modulation inside a Sagnac loop and therefore needs no bias voltage, resulting in no DC bias drifts. The system provides a DC output whose amplitude is a function of input signal frequency, and thus no high-frequency photo-detector is required.