Optical Reference System

MENLO ORS1500 3w


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, 1156 nm and many others between 500-1600 nm
Temperature of minimal thermal expansion between 20-35 °C
Output power >10 mW
Finesse ≈250 000*
Linewidth <1 Hz
Stabilit: Allan deviation 1s <2 x 10-15 (ULE substrate), <1 x 10-15 (fused silica substrate), <7 x 10-16 (crystalline coatings)
Linear drift rate approx. 150 mHz/s



The Optical Reference System (ORS) delivers an optical output with ultra narrow linewidth and outstanding short term stability. It 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 the vacuum chamber, control electronics, vibration isolation platform and acoustic isolation into a 19” rack system and delivers stateof- 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. Every system is fully characterized at Menlo Systems before shipment. The characterization is carried out either against a reference system with equal or better performance, or in a three cornered hat comparison.

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 modallan ORS v2 20190129


PN ProfKatoriCavities v3 20190129 2

Menlo Expert Ben Sprenger 2019
Dr. Benjamin Sprenger


Product Literature

Order Info

  • OrderInfo Info
  • ORS

+49 89 189166 0

Menlo Systems, Inc.
+1 973 300 4490