Whispering-Gallery Optical Microcavity PY-MR-MF-D-M001
JCOPTIX whispering-gallery optical microcavities confine light by total internal reflection at curved surfaces, creating high-Q resonators with evanescent input/output coupling. High Q, small mode volume, strong field enhancement, and narrow linewidth suit narrow-linewidth lasers, optical oscillators, soliton sources, nonlinear optics, and precision sensing. Multiple models and extensive customization are available; contact support. Whispering-gallery microcavities. Models: PY-MR-MF-D-M001, PY-MR-CA-D-M001, PY-MR-MF-D-M101, PY-MR-CA-D-M101, PY-MR-MF-D-M011, PY-MR-CA-D-M011. High Q; low cavity loss; high nonlinear coefficient; environmental robustness. Ultraprecision-machined MgF₂/CaF₂ fluoride crystals provide ultrahigh Q, ultralow loss, high nonlinearity, and strongly hydrophobic surfaces. Packaged microdisks improve parameter stability/lifetime; contact support for customization. Technical reference table 1: Magnesium fluoride, MgF₂: no=1.37 at 1.55 μm; transmission window 0.15-7.00; thermal expansion (10⁻⁶/k) 8.8c, 13.1a. Calcium fluoride, CaF₂: no=1.42 at 1.55 μm; window 0.16-7.00; thermal expansion (10⁻⁶/k) 18.85. Technical reference table 2: Magnesium-fluoride microdisk MFD, fully enclosed steel package, diameter 2-5 mm, Q>10⁸, linewidth at 1550nm <2 MHz, FSR 35-3.5 GHz, F≈17500. Magnesium-fluoride MFD, fully enclosed steel package, diameter 5-20 mm, Q>10⁹, linewidth at 1550nm <0.2 MHz, FSR 35-3.5 GHz, F≈17500. Calcium-fluoride microdisk CFD, fully enclosed steel package, diameter 2-5 mm, Q>10⁸, linewidth at 1550nm <2 MHz, FSR 33-3.3 GHz, F≈16500. Calcium-fluoride CFD, fully enclosed steel package, diameter 5-20 mm, Q>10⁹, linewidth at 1550nm <0.2 MHz, FSR 33-3.3 GHz, F≈16500. Crystal microdisks use ultraprecision CaF₂/MgF₂ cavities. Compared with ordinary planar optics, they offer lower temperature sensitivity, high nonlinearity, long energy storage/retention, repeatability, ultrahigh Q, complete interfaces, and plug-and-play use. Standard FC/APC is available; FC/PC, LC, SC, LT, and other connectors are customizable. Material index, transmission window, and expansion guide selection. FSR, cavity size, and interfaces can be customized for nonstandard environments, nonlinear optics, precision sensing, or low-noise optical time/frequency transfer. Material table, columns name/formula/index/window/thermal expansion 10⁻⁶/k: Magnesium fluoride, MgF₂: no=1.37 at 1.55 μm; transmission window 0.15-7.00; thermal expansion 8.8c, 13.1a. Calcium fluoride, CaF₂: no=1.42 at 1.55 μm; window 0.16-7.00; thermal expansion 18.85. Table 1. Crystal-microdisk material parameters. Selection table, columns model/product/package/diameter in mm/Q/linewidth at 1550nm/FSR/finesse F: Magnesium-fluoride microdisk MFD, fully enclosed steel package, diameter 2-5 mm, Q>10⁸, linewidth <2 MHz, FSR 35-3.5 GHz, F≈17500. Magnesium-fluoride MFD, fully enclosed steel package, diameter 5-20 mm, Q>10⁹, linewidth <0.2 MHz, FSR 35-3.5 GHz, F≈17500. Calcium-fluoride microdisk CFD, fully enclosed steel package, diameter 2-5 mm, Q>10⁸, linewidth <2 MHz, FSR 33-3.3 GHz, F≈16500. Calcium-fluoride CFD, fully enclosed steel package, diameter 5-20 mm, Q>10⁹, linewidth <0.2 MHz, FSR 33-3.3 GHz, F≈16500. Table 2. Microdisk selection, WGMR-MF/CF/LN-D. FSR estimates depend on effective index and diameter; different modes have different effective indices. Application value comes from high Q, narrow resonances, strong enhancement, and sensitive responses to environmental disturbances. Uses include ultranarrow lasers, microcavity nonlinear optics, photoacoustics, physical sensing, biochemical detection, ultrastable frequency references, and optical gyroscopes. JCOPTIX supplies cavities plus packaging/coupling, stability management, thermal tuning, and interface customization. They lower research barriers to high-Q devices and provide instrument/industrial teams an expandable path from components to modules. For precision metrology, communications, biomedicine, and quantum sensing, ultrahigh-Q cavities link basic research and engineering; application-specific customization is available. Thermal compensation improves stability and overcomes frequency drift as stated. Ultrahigh Q/stability, narrow modes, and small size facilitate integration for gyroscopes, particle/acoustic sensors, light-matter studies, and ultrasensitive broadband ultrasound. Before delivery, national-/industry-standard procedures test temperature/humidity, salt spray, vibration, acceleration, drops, failure analysis, and aging, with good performance reported. Devices ship packaged or unpackaged. Packaging extends life, limits Q degradation, adds functions, and isolates thermal/vibration disturbances. Resonant-mode distribution and typical linewidth: FSR≈c/(n_g*L). The source defines cc as vacuum light speed, n_g as frequency-dependent group index, and L as optical-path length. For custom spherical cavities the geometric circumference is 2π*R. FSR is a fixed frequency interval determining sparse/dense modal distribution: larger FSR separates modes more, smaller FSR packs them closer. Geometry dominates; smaller cavities generally have larger FSR. Resolving modes also depends on linewidth Δν, normally FWHM, with Q=ν/Δν. Q measures storage ability and total absorption/scattering/radiation loss; high Q and suitable FSR jointly determine spectra. Crystal characteristics include low absorption/scattering, controllable index dispersion, anisotropy, and thermal stability. Precision crystal cavities can have higher Q than conventional silicon devices and more consistent mode spacing than amorphous cavities. JCOPTIX illustrates mode distributions for 1. fused silica, 2. MgF₂, 3. CaF₂.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Figure of Merit | ~10⁹ |
| Applicable Wavelength | 1550 nm |
| Coupling Method | Tapered Fiber Coupling |
| Damage Threshold | 21.8 dBm (150 mW) |
| Operating Temperature Range | 15~35 ℃ |
| Interface Type | FC/APC |
| Package Type | Fully Enclosed Aluminum Housing |
| Package Dimensions | 59 mm × 25 mm × 14.2 mm |
| Suitable Environment | Nonclean Laboratory |
| Cavity Material | MgF₂ |
| Cavity Dimensions (Customizable) [Customizable; Listed Standard Specifications] | Ø10 mm |
| Free Spectral Range (Customizable) [Customizable; Listed Standard Specifications] | 7 GHz |
| Tuning Function | Temperature-Controlled Tuning |
| FWHM | <0.1 MHz or <1 MHz |
| Insertion Loss [off resonance] | <1.5 dB（off resonance） |
| Refractive Index [Material Parameter Table: Magnesium Fluoride (MgF₂), Cavity Material Property; @1.55 μm] | no=1.37（@1.55 μm） |
| Transmission Window [Material Parameter Table: Magnesium Fluoride (MgF₂), Cavity Material Property; Source Does Not Specify Transmission Window Unit] | 0.15-7.00 |
| Coefficient of Thermal Expansion [Material Parameter Table: Magnesium Fluoride (MgF₂), Cavity Material Property; Crystal Axes Retain Original c/a Labels] | 8.8c, 13.1a |
Key Features
Datasheet
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Supplier Information
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