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Atomic Absorption Spectroscopy: Instrumentation01:22

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An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
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Dichroic atomic vapor laser lock with multi-gigahertz stabilization range.

S Pustelny1, V Schultze2, T Scholtes2

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A compact dichroic atomic vapor laser lock (DAVLL) system using small cells offers high stability and multi-gigahertz frequency control. This compact system can lock laser frequencies over a wide range, even far from optical transitions.

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Area of Science:

  • Atomic, Molecular, and Optical Physics
  • Laser Spectroscopy
  • Quantum Optics

Background:

  • Conventional dichroic atomic vapor laser lock (DAVLL) systems typically use bulk vapor cells.
  • Achieving high stability and wide frequency tuning range in laser locking systems is crucial for various applications.

Purpose of the Study:

  • To present a compact DAVLL system utilizing buffer-gas-filled millimeter-scale vapor cells.
  • To demonstrate the stability and wide frequency tunability of this novel DAVLL system.

Main Methods:

  • Development of a DAVLL system with millimeter-scale vapor cells filled with buffer gas.
  • Experimental demonstration of laser frequency locking to (85)Rb hyperfine transitions.
  • Investigation of frequency control via temperature and buffer gas pressure adjustments.

Main Results:

  • The compact DAVLL system achieves stability comparable to conventional bulk cell systems.
  • Continuous laser frequency stabilization over a multi-gigahertz range is demonstrated.
  • Successful locking of laser frequency between hyperfine components and as far as 16 GHz from the optical transition was achieved.

Conclusions:

  • Millimeter-scale buffer-gas-filled vapor cells provide a compact and stable platform for DAVLL systems.
  • The system offers significant advantages in terms of size and wide-range frequency control.
  • This technology has potential for advanced applications requiring precise and tunable laser frequency stabilization.