AI Article Synopsis
- * The system utilizes up to 41 flat comb lines and includes a feedback loop that adjusts the comb, allowing for the creation of MWP filters with specific linear frequency responses.
- * In experiments, the maximum frequency measurement reached 20 GHz, with root-mean-square errors improving from about 51-66 MHz to as low as 30.7 MHz when using two filters together.
Article Abstract
We present the theory and experimental results of a microwave photonic (MWP) filter based instantaneous frequency measurement system. A quantum dash mode-locked laser is used as an optical frequency comb source. With up to 41 flat comb lines and a real-time feedback loop for comb shaping, a set of MWP filters with linear frequency responses for either linear unit or dB unit are experimentally demonstrated. The maximum measurement frequency can be up to 20 GHz limited by the available test-and-measurement instruments. By using one MWP filter, the root-mean-square error is 51∼66 MHz, which can be improved to 42.2 MHz for linear unit, and 30.7 MHz for dB unit by using two MWP filters together.
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| http://dx.doi.org/10.1364/OE.520269 | DOI Listing |
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