Abstract
Optical spectral analysis is essential to demonstrate the light-matter interactions from the frequency domain. Although the existing coherent spectrum analyzers (COSA) have already achieved resolutions of ∼50 fm, the mirror effect limits the further improvement in spectral resolution and thus the detection of low-concentration, small-scale analytes. Focusing on this problem, we first formulate the resolution degradation of COSA caused by the mirror effect, indicating the tuning nonlinearity of the local oscillator could introduce a non-stationary disturbance to the spectral data sampled at equal time intervals. Subsequent theoretical and experimental works have proved that the combination of dynamic wavelength calibration and spectral deconvolution can suppress the non-stationary disturbance. And the spectral resolution could reach 8 fm without extra compressions. This deconvolution-based scheme also avoids the long fibers used in scattering compressed schemes, improving the system's environmental stability.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
