Controlling the spectrum of a supercontinuum laser using a liquid crystal on silicon spatial light modulator

Ignacio Moreno; Pascuala Garcia-Martinez; María del Mar Sánchez López

doi:10.1117/12.2608829

3 March 2022 Controlling the spectrum of a supercontinuum laser using a liquid crystal on silicon spatial light modulator

Ignacio Moreno, Pascuala Garcia-Martinez, María del Mar Sánchez López

Author Affiliations +

Proceedings Volume 12023, Emerging Liquid Crystal Technologies XVII; 1202309 (2022) https://doi.org/10.1117/12.2608829
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

This communication presents some recent advances in the use of liquid-crystal on silicon (LCoS) spatial light modulators (SLM) to filter and control the broadband light spectrum of a supercontinuum (SC) laser source. An optical system is presented that first disperses the input laser and the spectrally separated components are projected onto the LCoS-SLM, where the state of polarization of each wavelength is separately modulated. This polarization control is based on the dynamic control of the spectral retardance function of the LCoS device. Then, recombining the reflected modulated spectral components results in an output laser source where the spectrum can be controlled dynamically from a computer. A new system is presented that covers the visible (VIS) and near the near infrared (NIR) bands. The system incorporates two branches to independently control the VIS and NIR spectral content, thus providing a programmable control of the SC laser source spectrum from 450 nm to 1600 nm. This new ability for controlling at will the wide spectra of the SC laser sources can be extremely useful for biological imaging applications.

Conference Presentation

Citation Download Citation

Ignacio Moreno, Pascuala Garcia-Martinez, and María del Mar Sánchez López "Controlling the spectrum of a supercontinuum laser using a liquid crystal on silicon spatial light modulator", Proc. SPIE 12023, Emerging Liquid Crystal Technologies XVII, 1202309 (3 March 2022); https://doi.org/10.1117/12.2608829

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