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Title: Developing a narrow-line laser spectrometer based on a tunable continuous-wave dye laser

We present the development of a dye-laser-based spectrometer operating at 550–600 nm. The spectrometer will be used to detect an ultra-narrow clock transition ({sup 1}S{sub 0}-{sup 3}P{sub 0}) in an Ytterbium optical lattice clock and perform high-resolution spectroscopy of iodine molecules trapped in the sub-nanometer channels of zeolite crystal (AlPO{sub 4}-11). Two-stage Pound-Drever-Hall frequency stabilization is implemented on the tunable continuous-wave dye laser to obtain a reliable operation and provide stable laser radiations with two different spectral linewidths. In the first-stage frequency locking, a compact home-built intracavity electro-optic modulator is adopted for suppressing fast frequency noise. With an acquisition time of 0.1 s the 670-kHz linewidth of the free-running dye laser is reduced to 2 kHz when locked to a pre-stabilization optical cavity with a finesse of 1170. When the pre-stabilized laser is locked to a high-finesse optical cavity, a linewidth of 1.4 Hz (2 s) is observed and the frequency stability is 3.7 × 10{sup −15} (3 s). We also measure and analyze the individual noise contributions such as those from residual amplitude modulation and electronic noise. The ongoing upgrades include improving long-term frequency stability at time scales from 10 to 100 s and implementing continuous frequency scan acrossmore » 10 GHz with radio-frequency precision.« less
Authors:
; ;  [1] ;  [2] ;  [3] ; ;  [1] ;  [2]
  1. Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 (China)
  2. (China)
  3. College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093 (China)
Publication Date:
OSTI Identifier:
22314689
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ACCURACY; BACKGROUND NOISE; CRYSTALS; DYE LASERS; FREQUENCY MODULATION; GHZ RANGE; IODINE; KHZ RANGE; LASER CAVITIES; LASER RADIATION; LINE WIDTHS; RADIOWAVE RADIATION; RESOLUTION; SPECTROMETERS; SPECTROSCOPY; STABILIZATION; YTTERBIUM; ZEOLITES