We are experts in customization

A well designed frequency stabilization system begins with the right cavity for the application. We offer customization of every aspect of cavity design: from size, geometry, and mounting method/materials to mirrors. We source only the highest quality mirrors with the exact coating properties and finesse you need, from single wavelength to multiple bands:

• Low finesse cavities for filtering
• Mid-finesse cavities for Doppler cooling
• High finesse (‘>300,000) cavities for precision spectroscopy of narrow atomic transitions

We can tailor the Free Spectral Range (FSR) of a cavity to meet extremely tight specifications – cavity length tolerances as low as nanometer level is possible, depending upon the cavity design. Alternatively, we can provide tunable cavities for filtering phase modulation sidebands, using piezoelectric tuning of cavity length to perform dynamic adjustment of the cavity resonance frequency.

Longer cavities: We often create longer cavities, either to obtain a lower FSR or for lower thermal-noise-limited stability. Please give us a call to discuss your applications and requirements.

Absolute Frequency Cavities: By designing a cavity with a resonant mode at an absolute frequency, we can reduce your need for time-consuming set-up of additional, costly, lossy frequency shifters. As an example, SLS can build a cavity with a mode within 100-300 MHz of a spectral line you are working with (e.g., Ca⁺ at 729 nm). A single inexpensive, efficient, frequency-shifting AOM can then bridge the narrow gap between the cavity resonance and the atomic resonance.

Dual band cavities: Dual band cavities have an upper limit of ~60,000 in finesse per band. More than two bands with lower finesse is also possible. We can easily offer up to 5 bands, and have provided more upon special request. Dual/multi band, mid-finesse (Ƒ<60,000) cavities are frequently used for Rydberg and EIT (electromagnetic induced transparency) physics and stabilization of lasers.

Multibore cavities: A single spacer can accommodate up to four mirror pairs, providing a frequency reference for many different color lasers. Due to the monolithic design of a multibore cavity, frequency drift between lasers is common-mode.

Custom cavity housings require a comprehensive understanding of their performance and design. We can provide:

• Calculation and modeling of the ideal position of cavity support points to minimize vibration sensitivity
• Transportable housings without loss of alignment
• Adaptation for large cavities, such as notched, up to 300 mm length

Fiber-coupled housings: Many housings can be customized with fiber pigtail inputs and/or outputs, eliminating the need for mode-matching calculations and cavity realignment. We can provide fiber pigtail outputs using standard fiber (single mode and/or polarization maintaining fiber) or your choice of fiber, with mode matching from fiber to cavity of ~90%. This is most often used for compact assemblies, or applications that require portability.