Laser heterodyning detector for frequency-domain ultrafast spectroscopy

Keith M. Berland; Enrico Gratton; Martin J. vandeVen

doi:10.1117/12.58229

1 April 1992 Laser heterodyning detector for frequency-domain ultrafast spectroscopy

Keith M. Berland, Enrico Gratton, Martin J. vandeVen

Proceedings Volume 1640, Time-Resolved Laser Spectroscopy in Biochemistry III; (1992) https://doi.org/10.1117/12.58229
Event: OE/LASE '92, 1992, Los Angeles, CA, United States

Abstract

The attainable frequency range of ordinary heterodyning and super-heterodyning frequency- domain fluorescence instrumentation is limited by the response of the optical detector rather than by the harmonic content of the light source. The replacement of the photomultiplier detector by a 6 (mu) microchannel plate detector has improved the frequency response from 500 MHz to 10 GHz. A new method is developed to detect fast, excited state processes by extending to the frequency-domain the well known pump/probe (absorption) technique used in the time-domain. The upper frequency limit attainable with this method is limited only by the pulse width of the light sources. For picosecond pulse lasers this limit extends to hundreds of gigahertz. A theoretical determination of the basic equations is given, and data are shown for the excited state decay of a rhodamine 6G sample in ethylene glycol.

Citation Download Citation

Keith M. Berland, Enrico Gratton, and Martin J. vandeVen "Laser heterodyning detector for frequency-domain ultrafast spectroscopy", Proc. SPIE 1640, Time-Resolved Laser Spectroscopy in Biochemistry III, (1 April 1992); https://doi.org/10.1117/12.58229

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