We introduce a diode-based laser with a fast frequency noise of 30 Hz2/Hz, corresponding to a Lorentzian linewidth of 100 Hz. We examine its characteristics in detail. Our focus is on exploring the variations and similarities in frequency noise and linewidth reduction. Additionally, we present the locking capability of these systems when applied to medium finesse cavities. The results provide insights into the unique operational characteristics of these ultra-low noise lasers and their potential applications in quantum technology.
This work reports on a compact and robust single-frequency laser emitting at 633 nm, for industrial metrology applications. The system integrates a miniaturized optical isolator, a single-mode fiber coupling and a vapor cell as frequency reference. The achieved absolute frequency stability is 10-8, while the output power from the fiber is >1 mW. The system shows stable operation over an ambient temperature range between 0 and 70°C, with an electrical power consumption of <3 W. This compact laser system can replace gas lasers in industrial metrology applications, and can serve as key component in future quantum-technology devices.
Compact and robust external-cavity diode laser (ECDL) systems are a mandatory requirement for many next-generation quantum technology applications, e.g. quantum communication and quantum sensors. Today’s commercially available ECDLs are used for proof-of-principle demonstrations of such applications, however do not meet the requirements for the use in real-world environments. We investigate a novel design for a compact and robust ECDL suitable for the integration into first quantum technology applications. Experimental results of first prototypes are presented and compared to a commercially available ECDL and numerical simulations.
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