Ultrastable Laser

MENLO SYSTEMS-Ultrastable cw Lasers, Add-ons for Metrology Optical Reference Cavity ORS1500_3w.jpg


Advanced Features and Benefits

  • State-of-the-art linewidth (<1Hz) and stability (<2 x 10-15 Hz)
  • Compact footprint (60 x 80 cm)
  • Fully characterized at Menlo Systems against another Optical Reference System
  • Custom systems tailored to customers' needs
  • The ORS can save you valuable R&D time, enabling you to focus on your experiments.
  • 12 cm long cylindrical cavity
Wavelength 1542, 1064, 657, 698, 729 and 1156 nm*
Temperature of minimal thermal expansion >20 °C
Output power >5 mW
Finesse ≈250 000*
Linewidth <1 Hz*
Stabilit: Allan deviation 1s <2 x 10-15, linear drift removed*
Linear drift rate approx. 150 mHz/s

*others on request


The Optical Reference System (ORS) consists of a cw laser locked to a stable high-finesse cavity made of ultra low expansion (ULE) glass. The compact design allows for integration of high vacuum, temperature stabilization, vibration and acoustic isolation into a 19” system while delivering state-of-the-art laser linewidth and stability. Additionally, the system design includes a mechanical locking feature which allows for transportation of the system without the need to readjust the beam coupling into the cavity, once the mechanism is disengaged.

Beat of two systems against each other


  • beat frequency mixed down to 30 kHz, sampled and Fourier transformed
  • FWHM linewidth <0.3 Hz
Dr. Benjamin Sprenger
Your direct line to our expert

Data sheets

Product literature

Ordering information

  • Product Code
  • ORS

+49 89 189166 0

Menlo Systems, Inc.
+1 973 300 4490

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