Nonlinear spectral interferometry to NIR sources

Itzel Reyna-Morales; Jesús Garduño-Mejía; Israel Rocha-Mendoza; Martha Rosete-Aguilar; Carlos Jesús Román-Moreno; Alfredo A. Bravo-Hernández; Ramiro Contreras-Martínez; Mitzi Ordoñez-Pérez; Naser Qureshi

doi:10.1117/12.2609285

4 March 2022 Nonlinear spectral interferometry to NIR sources

Itzel Reyna-Morales, Jesús Garduño-Mejía, Israel Rocha-Mendoza, Martha Rosete-Aguilar, Carlos Jesús Román-Moreno, Alfredo A. Bravo-Hernández, Ramiro Contreras-Martínez, Mitzi Ordoñez-Pérez, Naser Qureshi

Author Affiliations +

Proceedings Volume 11985, Nonlinear Frequency Generation and Conversion: Materials and Devices XXI; 1198508 (2022) https://doi.org/10.1117/12.2609285
Event: SPIE LASE, 2022, San Francisco, California, United States

Abstract

This work presents a commercial webcam CMOS (Complemented-Metal-Oxide-Semiconductor) implemented as a spectrometer for femtosecond pulses characterization at the Near-Infrared region (NIR, 1.1 - 1.6 μm), applying spectral interferometry. The spectral interferometry setup consists of a collinear Michelson interferometer in which two femtosecond pulses replicas, generated from a home-made Optical Parametric Oscillator (fs-OPO), are relatively delayed with respect to each other. A reflecting grating disperses the pulse replicas and then, the modulated spectrum is generated in a 2-Fourier setup, using a single lens, with the CMOS sensor located at the Fourier plane. The NIR CMOS response is produced through the Two-Photon Absorption (TPA) effect, capable of generating the nonlinear spectral intensity and the corresponding modulated spectrum (spectral interferometry signal). The cost-effective TPAspectrometer is capable of measuring the interferogram, with a high resolution of 0.72nm and very high sensitivity of few 𝜇W average power or few fJ per pulse. Finally, we calculate the spectral phase difference using a phase retrieval algorithm from the nonlinear spectral interferometry signal.

Conference Presentation

Citation Download Citation

Itzel Reyna-Morales, Jesús Garduño-Mejía, Israel Rocha-Mendoza, Martha Rosete-Aguilar, Carlos Jesús Román-Moreno, Alfredo A. Bravo-Hernández, Ramiro Contreras-Martínez, Mitzi Ordoñez-Pérez, and Naser Qureshi "Nonlinear spectral interferometry to NIR sources", Proc. SPIE 11985, Nonlinear Frequency Generation and Conversion: Materials and Devices XXI, 1198508 (4 March 2022); https://doi.org/10.1117/12.2609285

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