D2-210 Saturated Absorption Spectroscopy Module

D2-210 saturated absorption spectroscopy module provides primary frequency standard based on alkali metal hyperfine spectra

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As low as $6,425.00


  • Configurable for Potassium, Rubidium, or Cesium
  • Side or Peak Locking
  • Temperature stabilized
  • Intensity normalized
  • Magnetic shielding
  • Terminal or pass-through configuration
  • Improved mechanics
  • Optional Doppler subtraction and fiber coupling
  • 5 MHz loop bandwidth

The D2-210 Saturated Absorption Spectroscopy Module is an integral piece of our complete line of photonics tools supporting the AMO Community.

Saturated Absorption High-Precision Frequency Reference

Vescent Photonics‚Äô D2-210 second-generation Spectroscopy Module makes locking to atomic transitions easier and more powerful than ever before. Completely redesigned to maximize performance in a number of laser-locking environments, the D2-210 makes atomic absorption-referenced frequency locks simple. Designed to work as a general-purpose frequency discriminator, it is compatible with our D2-125 Laser Servo as well as other feedback loop filters. The D2-210 can be charged with either Potassium, Rubidium, or Cesium. It is magnetically shielded to reduce perturbations due to magnetic fields, and accommodates free-space or, optionally, a fiber-coupled input. The D2-210 allows flexible operation, accepting laser powers from microwatts to over a hundred milliwatts, and it also offers improved, easier-to-align optomechanics and a beam path that effectively eliminates back reflections to the laser. The D2-210 provides a signal to lock to either the side of an absorption or the peak and can optionally support Doppler-broadened background subtraction.

Fill Options

Potassium, Rubidium, or Cesium

Optical Input Configurations Free space or fiber coupled
Pass through or terminal
Input Power Range 0.75 to 1,000 mA
Supported Locks Side and Peak
Doppler Subtraction Optional
Detector Bandwidth >5 MHz
Temperature Stabilization Included
Photodetection Included
Power Requirements +5 V and ±15 VDC

3.62 x 4.98 x 1.7"

9.2 x 12.7 x 4.3 cm

All specifications subject to change without notice

1Optional Fiber coupling

2Not included. Available from D2-005 or ICE-PB1

D2-210_3.1_1 (518.57 kB)
D2-210 (66.74 kB)