CLS
Clock laser system
(Un-)lock the full potential of quantum technologies with ultra-stable laser systems
CLS
Clock laser system
Industrial-grade ultra-stable lasers with low phase noise enable advanced quantum technologies that rely on narrow-linewidth clock transitions and therefore require laser systems with sub-Hz linewidth and high stability even in out-of-the lab conditions. TOPTICA’s ultra-stable “CLS” lasers yield highest frequency stability far beyond 1 second integration time to drive very narrow optical transitions in atoms like Yb, Sr or ions like Yb+, Sr+, Ca+, and Ba+ or even in Th nuclei.
TOPTICA´s CLS usually use external cavity diode lasers whose linewidth is reduced to less than 1 Hz via frequency-stabilization to high-finesse optical ULE cavities. For wavelengths below ~ 660 nm, the fundamental laser at higher wavelength is first stabilized to the ULE cavity and then frequency converted (SHG/FHG). Amplification is possible via ALS-IR low-noise fiber amplifiers or TA pro tapered amplifiers. Robust design, excellent passive shielding and active vibration compensation make the CLS resilient towards external acoustic and seismic vibrations. A high-end temperature stabilization system guarantees highest stability towards temperature fluctuations. The complete system is controlled with one DLC pro -hosted interface and can be accessed with the PC GUI TOPAS.
TOPTICA´s CLS usually use external cavity diode lasers whose linewidth is reduced to less than 1 Hz via frequency-stabilization to high-finesse optical ULE cavities. For wavelengths below ~ 660 nm, the fundamental laser at higher wavelength is first stabilized to the ULE cavity and then frequency converted (SHG/FHG). Amplification is possible via ALS-IR low-noise fiber amplifiers or TA pro tapered amplifiers. Robust design, excellent passive shielding and active vibration compensation make the CLS resilient towards external acoustic and seismic vibrations. A high-end temperature stabilization system guarantees highest stability towards temperature fluctuations. The complete system is controlled with one DLC pro -hosted interface and can be accessed with the PC GUI TOPAS.
Your Benefits
Exceptional frequency stability (for elevated optical clock performance)
The CLS provides exceptional frequency stability to address optical narrow-linewidth transitions.
Industrial-grade quality and 19” rack integration option
The CLS is mounted in a metal-tray system, ensuring long-term stability, and can be housed in a TOPTICA 19" rack.
Long coherence time for high qubit fidelity
Optical qubit coherence times of >1s have already been demonstrated with the CLS.
All wavelengths / dual wavelengths
By using our well-established ECDL diode lasers together with our non-linear frequency conversion, we can offer all-in-one solutions from TOPTICA at many wavelengths, including 435 nm (Yb+, CLS at 871 nm + SHG), 578 nm (neutral Yb, CLS at 1156 + SHG), 674 nm (Sr+), 698 nm (neutral Sr), 729 nm (Ca+), 1550 nm (DFC Core + and Er+) and 1762 nm (Ba+), Even dual-wavelengths are possible, e.g. 840/1013nm.
Options
CLS FNC
The fiber noise cancellation (FNC) module compensates phase noise that is acquired in optical fibers along the optical path.
CLS Bridge
The CLS Bridge module allows to shift the output frequency of the CLS to a customized target frequency. Besides, it allows for linear frequency ramps and can therefore be used to compensate for linear cavity drifts.
CLS Seismic+
The CLS Seismic+ option is recommended for critical environments. It integrates a real-time seismic sensor to further enhance the isolation performance of the CLS-HFC pro and MCLS-HFC pro, extending down to frequencies as low as 0.2 Hz.
CLS IR Camera
The CLS IR Camera facilitates monitoring the optical cavity transmission via a camera to easily identify the geometry of the electro-magnetic mode oscillating in the cavity. This option only needs to be purchased for CLS wavelengths > 1000nm. For wavelengths < 1000nm, the camera is part of the CLS High-Finesse Cavity Package by default.