ORS
超稳激光器

Specifications

先进的功能和优点

为终极性能而设计的顶级系统
最终的相位噪声和频率稳定性
易于运输（机械运输锁)
高度可定制--可在广泛的波长范围内使用，并有多个选项
坚固和设计良好的单19寸机架系统，包括监测和控制系统以及隔振平台。
自动激光锁定-全天候24/7操作

	ORS
波长	500–1600 nm (IBS coatings), 900–1600 nm (XTAL coatings)
稳定性（MADEV在1秒，去除线性漂移）	<7 x 10^-16 (with FS-XTAL option) <1 x 10^-15 (with FS-IBS option) <2 x 10^-15 (with ULE-IBS, standard system)
线宽	<1 Hz
相位噪声（与激光源有关）	ULE-IBS FS-XTAL at 10 Hz -7 dBc/Hz -13 dBc/Hz at 100 Hz -47 dBc/Hz -47 dBc/Hz at 1000 Hz -70 dBc/Hz -70 dBc/Hz 适用于所有型号杂散信号<-20 dBc
输出功率	>10 mW (FC/APC 连接器), 根据要求提供高功率）
腔体长度	12.1 cm, 材制: 超低膨胀玻璃（ULE）, 圆柱形设计
自由光谱范围	1.24 GHz
线性漂移率	大约 150 mHz/s
主动隔振平台	包含

Description

光学参考系统(ORS)的设计是为了实现卓越的性能。它提供超窄线宽的激光，具有出色的频率稳定性。该系统的核心是一个作为CW激光的参考的高精细的Fabry-Pérot腔（长度为12.1厘米的圆柱形腔体）。该腔体由超低膨胀玻璃（ULE）制成，以零热膨胀点在真空中运行。通过主动隔振和隔声保证此参考腔即使在苛刻的实验环境下也能达到最佳性能。配合一个易用的腔体机械锁装置支持系统在搬运后无需重新准直腔内光路，确保了系统的便携性。系统还配备了Menlo全新开发升级的电子锁相环系统SYNCRO，其模块化的设计构架确保了其多功能以及直观易用。它集成了所有需要的电子模块，例如，超低噪声振荡器驱动源以及用于频率稳定的高速（模拟）伺服环路。通过7英寸的前置触控面板或者利用远程计算机上预装的图形用户界面（GUI）用户可以控制所有的参数。此外，附带的机载软件支持自动稳频（锁腔）以及系统实时监控。

点击观看ORS演示视频：

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.