ORC

Optical Reference Cavity in vacuum housing.

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ORC Optical Reference Cavity - Precise laser frequency stabilization

Ultrastable Reference

Optical reference for precise laser frequency stabilization

Compact Footprint

Space-saving design for easy integration

Modular Customization

Portfolio available as flexible building blocks

Specifications

	ORC-Cubic	ORC-Cylindric	XM-ORC
Wavelength	650 – 1750 nm	650 – 1750 nm	1550, 1397, 1156 or 1064 nm
Finesse	low / mid / high	low / mid / high	> 300k (1550, 1397 and 1156 nm)
Finesse	low / mid / high	low / mid / high	> 200k (1064 nm)
Cavity Length	5 cm	12.1 cm	12.1 cm
Free Spectral Range	3 GHz	1.24 GHz	1.24 GHz
Windows	AR coated, angled and wedged	AR coated, angled and wedged	AR coated, angled and wedged
Thermal Shielding	active and passive	active	active
Thermal Noise ADEV Limit			1.6 × 10⁻¹⁶
Linear Drift Rate	~150 mHz/s	~150 mHz/s	~150 mHz/s
Ambient Temperature Sensitivity	~ 4 mK/°C	~ 4 mK/°C	~ 4 mK/°C
Temperature Sensor	10 kΩ NTC	10 kΩ NTC
Peltier Elements	2× 25 W	1× 56 W
Ion Getter Pump	5 l/s	10 l/s
Achievable Pressure	< 10^-7 mbar	< 10^-7 mbar
Stainless Steel Valve	Cu sealed, KF flange	Cu sealed, CF flange
Dimensions	W 28 cm, L 28 cm, H 18 cm	W 48 cm, L 35 cm, H 35 cm
Vacuum Chamber Material	Aluminum	Stainless steel
Mass	15 kg	55 kg	55 kg
Rack Integration	n.a.	n.a.	n.a.

Options

Two modules holding all optics required for input coupling one single wavelength to the cavity in the range from 650 to 1560 nm, Pound-Drever-Hall locking as well as power monitoring of the transmitted light. The modules are rigidly mounted onto the cavity housing making realignments after transportation obsolete.

Complementary optics mounted on the ORC-OPTIC-CUB/ORC-OPTIC-CYL module for coupling a second laser wavelength in the range from 650 to 1560 nm simultaneously to the same cavity. This add-on requires the ORC-OPTIC-CUB/ORC-OPTIC-CYL option.

For the simultaneous stabilization of multiple lasers to the same reference cavity, custom coating designs and cavity mirrors which are highly reflective at two or multiple wavelengths can be tailored to your application.

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

Fiber-coupled compact optical unit for the generation of the PDH reflection signal.

For stabilizing the laser to the cavity, this package provides all required electronics in a single configurable device, i.e., Menlo’s SYNCRO controller (3rd 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 and a TEC controller for temperature stabilization.

For stabilizing the laser to the cavity, this package provides all required electronics in a single configurable device, i.e., Menlo’s SYNCRO controller (3rd 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, a TEC controller for temperature stabilization and a laser module at 1542 or 1550 nm.