Pulse shaping for background free broadband CARS

Young Jong Lee; Marcus T. Cicerone

doi:10.1117/12.809102

25 February 2009 Pulse shaping for background free broadband CARS

Young Jong Lee, Marcus T. Cicerone

Proceedings Volume 7183, Multiphoton Microscopy in the Biomedical Sciences IX; 71830Y (2009) https://doi.org/10.1117/12.809102
Event: SPIE BiOS, 2009, San Jose, California, United States

Abstract

We demonstrate that pulse shaping of a narrowband pulse can suppress the nonresonant background (NRB) contribution and retrieve resonant Raman signals efficiently in a broadband coherent anti-Stokes Raman scattering (CARS) spectrum. A pulse shaper prepares a probe pulse with two spectral components of differing phase. When the CARS fields generated by these two out-of-phase components are optically mixed, the NRB signal is greatly reduced while a resonant CARS signal survives with minimal attenuation. We discuss three model schemes for the interfering pulse components: (1) two pulses with different bandwidths and the same center frequency (ps-fs scheme); (2) two pulses with the same bandwidth and shifted center frequencies (ps-ps scheme); and (3) a pulse with different phases across the center frequency (fs(+/-) scheme). In all schemes, only the resonant signal from the "3-color" CARS mechanism survives. The resonant signal from "2-color" CARS mechanism vanishes along with the NRB. We discuss optimization conditions for signal intensity and shape of resonant CARS peaks.

Citation Download Citation

Young Jong Lee and Marcus T. Cicerone "Pulse shaping for background free broadband CARS", Proc. SPIE 7183, Multiphoton Microscopy in the Biomedical Sciences IX, 71830Y (25 February 2009); https://doi.org/10.1117/12.809102

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