With the development of technology, ultra-stable optical resonant cavities with ultra-stable resonance frequency and ultra-high finesse have begun to enter the market.

Optical resonant cavity, referred to as optical cavity, is an optical device that achieves spectral filtering and coherent enhancement of optical fields through self-interference of light beams. It is one of the basic components of optical systems and also the structural foundation of lasers.

Optical resonant cavities are typically composed of two or more planar or concave spherical optical mirrors (cavity mirrors) perpendicular to the axis of the active medium. Depending on the shape and relative position of the optical mirrors, optical resonant cavities are classified into parallel plane cavities, plano-concave cavities, symmetric concave cavities, convex cavities, etc. Key parameters of optical resonant cavities include resonance frequency, operating wavelength, finesse, resonant transmissivity, and free spectral range.

According to the '2024-2028 China Optical Resonant Cavities (Optical Cavities) Market Monitoring and Future Development Prospects Research Report' released by the New Think Tank Industry Research Center, optical resonant cavities are essential components of lasers, providing feedback energy, controlling oscillating light beams within the cavity, and enhancing and maintaining laser beam output. A laser is a device capable of generating and emitting laser light, typically consisting of three parts: an active medium, a pump source, and a resonant cavity. Lasers come in various types and have a wide range of applications. In 2023, the market size of lasers in China exceeded 120 billion yuan, with major laser companies including RUIKE Laser, Chuangxin Laser, Han's Laser, Laserwin, and HGTECH.

As the basic components of lasers, optical resonant cavity-related technologies have been rapidly developing in recent years, with key technologies including mirror coating processes, material selection for mirrors and cavities, precise temperature control technology, etc. With technological advancements, ultra-stable optical resonant cavities with ultra-stable resonance frequencies and ultra-high finesse have begun to enter the market.

According to the '2024-2029 Ultra-Stable Optical Resonant Cavities (Ultra-Stable Cavities) Industry Market Depth Research and Investment Prospect Forecast Analysis Report' released by the New Think Tank Industry Research Center, ultra-stable optical resonant cavities can be used in high-precision optical signal processing, quantum precision measurement, laser sensing, quantum communication, spectral filtering, biomedicine, environmental monitoring, and other scenarios. For a long time, due to technological limitations, the ultra-stable optical resonant cavity market has been dominated by foreign companies such as the US-based SLS Corporation, and the Chinese market has relied on imports.

Relevant research institutions and enterprises in China that focus on ultra-stable optical resonant cavities include the Micro-Nano Optics Precision Detection and Quantum Sensing Research Laboratory at the Yangtze River Delta Institute of Optoelectronics and the Qingyuan Tianzhiheng Quantum Technology Co., Ltd. (Tianzhiheng Technology). In 2023, Tianzhiheng Technology developed and launched the first domestically produced ultra-stable optical resonant cavity, which has a zero coefficient of thermal expansion and can achieve extremely low absorption loss in an ultra-high vacuum environment. It has now achieved mass production and filled the market gap in this field in China.

Industry analysts from New Think Tank indicate that optical resonant cavities are one of the basic components of optical systems and the structural foundation of lasers. In recent years, with the expansion of optical system and laser applications, the market for optical resonant cavities has continued to develop. At the same time, benefiting from advancements in materials and optical technology, the design and manufacturing techniques of optical resonant cavities have also undergone continuous innovation, with ultra-high finesse, extremely low loss, and ultra-stable resonance frequency being important upgrade directions.