Applying Non-Steady-State Photo-Emf Technique to Detection of Higher Order Auto Correlation Functions of Ultrashort Optical Pulses

 

P. Moreno Zarate*^1,2, Alexandre S. Shcherbakov¹, Svetlana Mansurova³

 

¹ National Institute for Astrophysics, Optics & Electronics, Puebla, 72000, México. *pemzamx@gmail.com.

² NovaUniversitas, Ocotlan de Morelos, 71510, Mexico.

 

Abstract

Here we examine a new application of the adaptive detectors based on non-steady-state photo-electro-motive force effect for the detection of higher order correlation functions, aiming the estimation of the parameters of ultra short optical pulses arranged in high-repetition trains. For this purpose three beam interferometer scheme with two signal beams modulated at different frequencies is proposed. Theoretical analysis of non-steady-state photo-EMF current generated by light distribution formed by superposition of three waves is performed and the possibility to detect simultaneously second and higher order correlation function is demonstrated. Potential advantages and disadvantages of such detection scheme for measuring the higher order auto-correlations functions are discussed.

Keywords: autocorrelation function, picosecond optical pulses, photo-EMF detectors.

 

Resumen

En este trabajo se analiza una novedosa aplicación de detectores adaptivos a base del efecto de Fuerza-Foto-Electromotriz (p-EMF) en estado no estacionario para detección de las funciones de correlación de alto orden. Dicha detección tiene como objetivo la caracterización y estimación de los parámetros de trenes de pulsos ópticos ultra cortos con alta tasa de repetición. Con esta finalidad se propone un esquema experimental que utiliza un interferómetro de tres haces con dos de ellos modulados temporalmente en fase. Posteriormente se presenta el análisis teórico de la corriente p-EMF generada por la distribución-intensidad formada en la superposición de tres haces que incidan en detectores bajo las condiciones experimentales antes mencionadas. Los resultados de este análisis demuestra la posibilidad de detectar simultáneamente la función de correlación de segundo y de cuarto orden. Finalmente se discuten las ventajas y desventajas potenciales de la detección de funciones de auto correlación utilizando los detectores de p-EMF.

 

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Acknowledgements

The authors want to thank to the Mexican National Council forof Science and Technology, Consejo Nacional de Ciencia y Tecnología, (CONACyT), for financial support through grantthe scholarship number 160159, and the CONACyT projects No. 61237 and No. 84922.

 

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