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Thorlabs Saturated Absorption Spectroscopy Systems

Thorlabs Saturated Absorption Spectroscopy Kit

  • Saturated Absorption Spectroscopy for Locking to Atomic Transitions
  • Rubidium or Custom Vapor Cell Options
  • PM Fiber-Coupled Setup
  • Ideal for Laser Locking or Teaching Labs

The Thorlabs SKSAS kit offers a proven set of components to construct a compact, fiber-coupled Saturated Absorption Spectroscopy (SAS) setup. It offers a method for producing a highly stable lock for tunable lasers at the peak of atomic hyperfine structure transitions. The kit also allows for the study of the hyperfine structure and Doppler broadening of atomic transitions.

The kit has been designed using stock optics and mechanics, as well as compatible custom components. This makes these kits adaptable using other Thorlabs cage system and lens tube components. For a list of the major components and subsystems included in the SAS kit, please see the Kit Contents tab.

While the vapor cell heater is included in the kit, please note that the vapor cell and temperature controller must be purchased separately. Currently, we offer rubidium reference vapor cells, which are available below. A variety of custom vapor cells are also available; please contact us for more details. Thorlabs'TC200 Temperature Controller is compatible with the cell heater.

Saturated Absorption Spectroscopy

Saturated Absorption Spectroscopy (SAS) systems provide a means to create a highly sensitive lock tied directly to an atomic transition. When an atom absorbs (or emits) a photon, the absorption (or emission) frequency is Doppler shifted. To create a more narrow laser lock, Doppler Broadening is eliminated by use of the well-known saturated absorption technique that resolves the hyperfine structure of atomic transitions. For a detailed tutorial on SAS, please see the SA Spectroscopy tab.

Custom Options and Assembly Services
Our spectroscopy kits are adaptable to most tunable lasers with user-supplied feedback mechanisms. While our standard kit is designed to accept PM fiber-coupled sources, we can also offer kits for free-space input. We can also offer assembly services upon request. To discuss these and other custom options, please contact us

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