Sub-Doppler resolution 3.4 μm spectrometer with an efficient difference-frequency-generation source

Masashi Abe, Keisuke Takahata, Hiroyuki Sasada

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We have developed a 3.4 μm spectrometer for sub-Doppler resolution molecular absorption spectroscopy. The source is based on the difference frequency generation using a 1.06 μm Nd:YAG laser, a 1.55 μm distributed-feedback laser diode, and a ridge waveguide periodically poled lithium niobate with a conversion efficiency of 9%/W. The generated radiation has a power level of about 300 μW, a linewidth of less than 100 kHz, and a continuous tuning range over 10 cm-1. The spectrometer allows us to observe six saturated absorption lines of 12CH4 with 0.3-0.4 MHz width and 1.3%-1.7% depth relative to the corresponding linear absorption lines.

Original languageEnglish
Pages (from-to)1744-1746
Number of pages3
JournalOptics Letters
Volume34
Issue number11
DOIs
Publication statusPublished - 2009 Jun 1

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spectrometers
molecular absorption
molecular spectroscopy
distributed feedback lasers
lithium niobates
YAG lasers
ridges
absorption spectroscopy
semiconductor lasers
tuning
waveguides
radiation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Sub-Doppler resolution 3.4 μm spectrometer with an efficient difference-frequency-generation source. / Abe, Masashi; Takahata, Keisuke; Sasada, Hiroyuki.

In: Optics Letters, Vol. 34, No. 11, 01.06.2009, p. 1744-1746.

Research output: Contribution to journalArticle

Abe, Masashi ; Takahata, Keisuke ; Sasada, Hiroyuki. / Sub-Doppler resolution 3.4 μm spectrometer with an efficient difference-frequency-generation source. In: Optics Letters. 2009 ; Vol. 34, No. 11. pp. 1744-1746.
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