CW- and pulse-pumped fiber super-continuum generators

Sergey Kobtsev; Sergey Smirnov

doi:10.1117/12.762244

13 February 2008 CW- and pulse-pumped fiber super-continuum generators

Sergey Kobtsev, Sergey Smirnov

Proceedings Volume 6875, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VII; 68750S (2008) https://doi.org/10.1117/12.762244
Event: Lasers and Applications in Science and Engineering, 2008, San Jose, California, United States

Abstract

The present paper analyses features of super-continuum generated from pulsed and CW excitation. It has been shown that generation mechanisms and many properties of super-continuum produced with CW excitation are cardinally different from those of super-continuum generated by pulsed excitation. On the other hand, different applications pose different, and often opposite requirements to the super-continuum, which cannot be satisfied within a single universal technique of super-continuum generation. In this connection, we have analyzed pulsed and CW schemes of super-continuum generators and conditions which should be fulfilled in order to achieve optimal super-continuum parameters required in most typical super-continuum applications (metrology, tomography, spectroscopy, communications). In particular, we consider a special regime of super-continuum generation, where an amplitude-modulated CW pump breaks up into periodic sequence of ultra-short pulses under the action of induced modulation instability. In the work we have studied for the first time the effect of noise (spontaneous emission) on this break-up and determined conditions for depth and frequency of initial modulation needed for this process both numerically and analytically (in the approximation of slightly intensity modulated CW pump radiation).

Citation Download Citation

Sergey Kobtsev and Sergey Smirnov "CW- and pulse-pumped fiber super-continuum generators", Proc. SPIE 6875, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VII, 68750S (13 February 2008); https://doi.org/10.1117/12.762244

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