Options

• Optics Module for Input Coupling, PDH Locking, and Monitoring

  Product Code: ORC-OPTIC-CUB / ORC-OPTIC-CYL

  Two modules holding all optics required for input coupling to the cavity, Pound-Drever-Hall locking as well as mode and power monitoring of the transmitted light. The modules are rigidly mounted onto the vacuum housing making realignments after transportation obsolete.

• ORC Fused Silica Mirror Substrate Package

  Product Code: ORC-FS-IBS

  The Fused Silica Mirror Substrate Package is an economic solution to reduce the thermal noise floor of the cavity. Here, fused silica mirror substrates are used instead of ULE substrates.  In order to be able to operate the cavity at room temperature, ULE compensation rings (patented design, sold under a licensing agreement with the Physikalisch Technische Bundesanstalt (PTB)) are contacted onto the fused silica substrates.

• ORC Crystalline Mirror Coating Package

  Product Code: ORC-FS-XTAL

  For ultimate frequency stability, the ORC-FS-XTAL Option is indispensable. This option is available for the ORC-Cubic only. Here, highly reflective crystalline coatings are used on fused silica substrates as cavity mirrors. This strongly reduces the thermal noise floor. In order to be able to operate the cavity at room temperature, ULE compensation rings (patented design sold under PTB license) are contacted onto the fused silica substrates.

• Rack Mounting Package

  Product Code: ORC-CUB-6U

  Using the Rack Mounting Package, the ORC can be easily mounted in a standard 19-inch rack with 6 height units. This option is available for the ORC-Cubic only. For rounding off the compact rack solution, we recommend using this option together with the optics modules for input coupling, PDH locking and monitoring.

• ORC Mirror Coatings for Multiple Wavelengths Package

  Product Code: ORC-MWL

  For simultaneous stabilization of multiple lasers to the same reference cavity, we provide customized cavity mirrors. These custom coatings are highly reflective in two or multiple wavelength ranges.

• Pound-Drever-Hall Servo Electronics Package

  Product Code: ORC-PDH

  For stabilizing the laser to the cavity, this package provides all required electronics in a single configurable device, i.e., Menlo’s SYNCRO controller (3^rd generation). The SYNCRO provides full software control of all parameters and intuitive use via touchscreen. This 3U, 19-inch device can also be remotely accessed via LAN. The package includes phase modulation and demodulation, and a fast analog PI²D controller (>10 MHz bandwidth) providing two servo outputs for fast and slow actuators.

• Characterization of the Zero-Crossing Temperature

  Product Code: ORC-CTE

  It is of ultimate importance to determine the zero-crossing temperature of the coefficient of thermal expansion (CTE) of the ULE reference cavity. This procedure, that is in principle simple, requires a dedicated measurement infrastructure and is very time consuming due to the long thermalization time constant. Menlo routinely characterizes the CTE zero-crossing to within 50 mK.

• TEC Driver Package

  Product Code: ORC-TEC

  A TEC driver to stabilize the temperature of the reference cavity to the zero-crossing temperature of the coefficient of thermal expansion.

• Reference Cavity without Vacuum Enclosure

  Product Code: ORC-CAV-CUB / ORC-CAV-CYL

  Reference cavity with optically contacted high finesse cavity mirrors but without vacuum enclosure and ion getter pump. Custom cavity designs are also available upon request.

• Reference Cavity Spacer Package

  Product Code: ORC-SPCR-CUB, ORC-SPCR-CYL

  Bare cavity spacer made out of ULE glass without cavity mirrors to build your own reference cavity.  CAD models are available for cylindric and cubic geometries.