Femtosecond Chirp-Free Transient Absorption Method And Apparatus

Patent · Tue Feb 20 00:00:00 EST 2001

OSTI ID:879574

McBranch, Duncan W ^[1]; Klimov, Victor I ^[2]

---

1. Santa Fe, NM
2. White Rock, NM

A method and apparatus for femtosecond transient absorption comprising phase-sensitive detection, spectral scanning and simultaneous controlling of a translation stage to obtain TA spectra information having at least a sensitivity two orders of magnitude higher than that for single-shot methods, with direct, simultaneous compensation for chirp as the data is acquired. The present invention includes a amplified delay translation stage which generates a splittable frequency-doubled laser signal at a predetermined frequency f, a controllable means for synchronously modulating one of the laser signals at a repetition rate of f/2, applying the laser signals to a material to be sample, and acquiring data from the excited sample while simultaneously controlling the controllable means for synchronously modulating.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• Assignee: McBranch, Duncan W. (Santa Fe, NM); Klimov, Victor I. (White Rock, NM)
• Patent Number(s): US 6191861
• Application Number: 09/249726
• OSTI ID: 879574
• Country of Publication: United States
• Language: English