Physical processes behind a Ti:Sa femtosecond oscillator

M. Fernández-Guasti; E. Nava; F. Acosta; C. Roychoudhuri

doi:10.1117/12.893116

28 September 2011 Physical processes behind a Ti:Sa femtosecond oscillator

M. Fernández-Guasti, E. Nava, F. Acosta, C. Roychoudhuri

Proceedings Volume 8121, The Nature of Light: What are Photons? IV; 812118 (2011) https://doi.org/10.1117/12.893116
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

The sharply peaked comb structure that arises from a mode-locked cavity is usually explained in terms of the superposition of monochromatic waves with integer wavelength multiples of the round trip of the cavity. However, the non interaction (or non interference) of waves implies that these wave-fields cannot sum themselves to reorganize either their amplitudes or their energies. The summation has to be carried out either by a nonlinear medium whose output involves the wave-mixing and/or it is performed by the detector. The output of a femtosecond Titanium Sapphire oscillator is analyzed with the above mentioned framework in mind. The spectrum is obtained in mode-locked and non mode-locked operation via a grating spectrometer for different cavity detunnings. The time dependence is measured via a fast photo-diode to record the repetition rate. A frequency resolved optical gating (FROG) device is used to resolve the temporal shape of the femtosecond pulses. The data is examined from two viewpoints: The superposition process is carried out (a) by the filed amplitudes themselves, or (b) by some interacting material dipoles.

Citation Download Citation

M. Fernández-Guasti, E. Nava, F. Acosta, and C. Roychoudhuri "Physical processes behind a Ti:Sa femtosecond oscillator", Proc. SPIE 8121, The Nature of Light: What are Photons? IV, 812118 (28 September 2011); https://doi.org/10.1117/12.893116

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available