Optical Reference System

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 60 cm)
  • Full 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.
Wavelength 1542 nm, 1064 nm others on request
Temperature of minimal thermal expansion >20 °C
Output power >5 mW
Finesse 250 000
Linewidth <1 Hz
Stability: Allan deviation 1s <2 x 10-15, linear drift removed                           
Linear drift rate approx. 150 mHz/s


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
  • ORS1500


+49 89 189166 0

Menlo Systems, Inc.

+1 973 300 4490

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