Single-Laser, Single-Beam Pump/Probe Thermal Lens Spectroscopy

Author:

Erskine Steven R.1,Foley C. Michael1,Bobbitt Donald R.1

Affiliation:

1. Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas 72701

Abstract

A unique design for a thermal lens photometer based on a single-laser/single-beam configuration is presented. The system is compatible with lock-in detection and uses a pair of acoustooptic modulators to temporally separate the pump and probe events. A minimum measurable absorbance of 6 × 10−6 cm−1 is reported. Limitations to the use of acoustooptic modulation at high absorbances are discussed.

Publisher

SAGE Publications

Subject

Spectroscopy,Instrumentation

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