Options

• Crystalline Mirror Coating Package

  Product Code: ORS-FS-XTAL

  For ultimate frequency stability, the ORS-FS-XTAL Option is indispensable. Here, highly reflective crystalline coatings (available above 900 nm) are used on fused silica substrates as cavity mirrors. This strongly reduces the thermal noise floor. In addition, the intracavity power is actively stabilized with feedback to an AOM.

• Fused Silica Mirror Substrate Package

  Product Code: ORS-FS-IBS

  The Fused Silica Mirror Substrate Package is an economic solution to reduce the thermal noise floor. Here, fused silica mirror substrates are used instead of ULE substrates. In addition, the intracavity power is actively stabilized with feedback to an AOM.

• AOM Frequency Shift Package

  Product Code: ORS-AOM-FSH

  The ORS can be tuned over tens of picometers in steps of the free spectral range. To reach a specific frequency in-between these discrete steps (e.g., the Strontium transition at 698 nm), an additional noise-free frequency shift is applied using acousto-optic modulator. The AOM Frequency Shift package provides the precise output at the desired frequency for the ORS.

• EOM Sideband Lock Package

  Product Code: ORS-EOM-SBL

  The EOM Sideband Lock Package provides a broadly tunable, ultrastable laser output. Here, an electro-optical modulator (EOM) is used to generate sidebands on the laser light that is sent to the cavity. Subsequently, a modulation sideband is coupled into the reference cavity, while the carrier is used as a frequency tunable, ultrastable user output. A tuning of up to half of the free spectral range is possible.

• Fiber Noise Cancellation Package

  Product Code: ORS-FNC

  For transmission of sub-Hz linewidth laser light for more than a few meters, we recommend active phase noise compensation of the ultrastable output. The ORS-FNC interferometrically detects the phase noise induced by temperature variations and vibrations in the fiber and actively compensates this using a phase-locked loop and an AOM as actuator. The residual noise contribution of such a stabilized fiber link is well below the frequency stability of the ORS.

• Mirror Coatings for Multiple Wavelengths Package

  Product Code: ORS-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.

• Second Harmonic Generation Package

  Product Code: ORS-SHG

  It can be advantageous to realize an ultrastable laser system at a longer wavelength and frequency double its output using the ORS-SHG package (e.g., at 1397 nm for the Strontium clock transition at 698 nm). Frequency doubling can be integrated into your system with free-space or fiber-coupled output.

• High Output Power Package

  Product Code: ORS-FA, ORS-TA

  Higher output power levels can be reached using low noise fiber amplifiers (ORS-FA) or semiconductor optical amplifiers with a tapered geometry (ORS-TA). When amplifiers are being used, they are placed within the frequency stabilization servo loop and thus merely affect the system’s stability.

• Cavity de-Drifting Package

  Product Code: ORS-DDRIFT

  The inevitable shrinking drift of the reference cavity can partially be pre-compensated using a software-based scheme in conjunction with an AOM. If the system is equipped with a package that includes an AOM (ORS-FNC, ORS-AOM-FSH or FS substrates) de-drifting can also be realized via this AOM.

• Digital Servo Interface for Stabilization to External Atomic Transition Package

  Product Code: ORS-DSRV

  We provide a digital interface with which the frequency of the ultrastable output can be stabilized to an external clock transition. The user supplies a frequency error reading and the SYNCRO control platform integrates this and feeds back to an AOM in order to stabilize the laser to the external reference. If the system is equipped with a package that includes an AOM (ORS-FNC, ORS-AOM-FSH or FS substrates) stabilization to an external transition can also be realized via this AOM.

• General information

  Electronic modules that come with an extension package typically slide into Menlo Systems SYNCRO control platform. This guarantees smooth integration into the existing hardware and software infrastructure.