Narrow-Linewidth Microcavity Brillouin Laser with Suppressed Temperature Fluctuations

Laser technology has always aimed for stability and precision. Yet, environmental factors constantly interact with operational modalities, leading to unwanted changes in temperature and perturbations that affect the laser's performance negatively. Therefore, there exists a need for advancements in laser technology that can deliver consistently high-quality output notwithstanding environmental disturbances. Previously employed techniques often faced challenges in compensating for minor temperature drifts and thermal fluctuations. Conventional methods lacked the needed accuracy for detecting such changes. The issue with these methods was the inability to manage and suppress disturbances, which led to decreased laser efficiency and performance. Consequently, rapid and minor thermal fluctuations remained as critical problems without an effective solution.

Technology Description

The ultrastable laser technology system combines the capabilities of a large mode-volume optical resonator and stimulated Brillouin scattering (SBS) optical nonlinearity. These components together suppress the resonator's frequent thermal fluctuations. The system lases with an ultranarrow linewidth of 20, which is highly precise. In addition to this, the technology meticulously compensates for the laser's long-term temperature drift by using the narrow Brillouin line to detect minuscule changes in the resonator's temperature, for example, changes as tiny as 85 nK. This laser technology stands out for its superior stability and precision. It overcomes common environmental perturbations with its capability to stabilize resonators. The specificity of the narrow Brillouin line for temperature detection and compensation is another great feature. It can sense and compensate for minute temperature changes, thus ensuring consistent, high-functioning laser technology irrespective of environmental changes. This precise and advanced temperature measurement makes the ultrastable laser well-adapted to a wide variety of applications.