AI Article Synopsis
- The new all-fiber frequency comb filter allows for adjustable tuning of the frequency comb's free spectral range (FSR) using a unique spectral Talbot-like effect.
- By applying a linear strain gradient, the phase relationships between samples in a chirped fiber Bragg grating can be altered.
- The demonstration shows that the FSR can be varied significantly, ranging from 51 GHz down to 3.9 GHz in distinct steps based on the original FSR of the unchirped grating.
Article Abstract
We demonstrate a new class of all-fiber frequency comb filter that exhibits unprecedented capabilities for tuning the comb's free spectral range (FSR). The filter exploits a spectral Talbot-like effect in a sampled chirped fiber Bragg grating. The FSR is tailored by application of a linear strain gradient to modify the relative phase between the samples. The FSR can be tuned in discrete steps that correspond to the nominal value of the FSR of the sampled unchirped grating divided by integer factors. In this demonstration the FSR is varied from 51 to 3.9 GHz.
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| http://dx.doi.org/10.1364/ol.30.002062 | DOI Listing |
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