Auniontech COSMO f-2f Self-Referencing Carrier-Envelope Offset (CEO) Measurement Module
| Brand | Auniontech |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | COSMO Optical Frequency Comb CEO Measurement Module |
| Price | Upon Request |
| Input Pulse Wavelength | ~1560 nm |
| Input Pulse Energy | > 200 pJ |
| Input Fiber | PM1550 |
| Input Optical Interface | FC/APC |
| Output Electrical Interface | SMA |
| Module Dimensions | ~50 × 35 × 22 mm |
| Input Average Power | 400 mW |
| Operating Temperature | 0–40 °C |
| f<sub>CEO</sub> Peak SNR | > 35 dB |
Overview
The Auniontech COSMO f-2f Self-Referencing Carrier-Envelope Offset (CEO) Measurement Module is a compact, turnkey solution engineered for precise detection and stabilization of the carrier-envelope offset frequency (fCEO) in optical frequency combs. Based on the f-2f interferometric self-referencing principle, the module enables direct phase-coherent linkage between optical and microwave domains—fundamental to optical atomic clocks, ultra-stable laser metrology, precision spectroscopy, and quantum coherent control. The COSMO module integrates nonlinear waveguide-based supercontinuum generation within a hermetically sealed, alignment-free architecture, allowing spectral broadening across at least one octave (e.g., from ~1560 nm to <780 nm) without external bulk optics or active stabilization. This design ensures robustness against environmental perturbations while maintaining high signal fidelity under low-input-pulse-energy conditions.
Key Features
- Compact OEM-grade module (50 × 35 × 22 mm) with fully integrated nonlinear waveguide for octave-spanning supercontinuum generation
- Optimized for femtosecond Er-doped fiber lasers operating near 1560 nm; compatible with PM1550 polarization-maintaining input fiber (FC/APC interface)
- Low-threshold fCEO detection: functional at input pulse energies >200 pJ and average powers up to 400 mW
- High-fidelity electrical output via SMA connector: delivers RF signal centered at fCEO with >35 dB peak signal-to-noise ratio (SNR) in typical lab environments
- No active alignment required; factory pre-aligned and characterized for immediate integration into feedback loops (e.g., PLL, PID controllers)
- Thermally stable operation across 0–40 °C ambient range; suitable for both benchtop and embedded instrumentation platforms
Sample Compatibility & Compliance
The COSMO module is designed for use with mode-locked Er-fiber lasers emitting transform-limited pulses near 1560 nm, including commercially available oscillators such as Menhir Photonics’ 1 GHz repetition-rate lasers. Its PM1550 fiber input ensures polarization fidelity critical for interference-based f-2f detection. While not a standalone certified instrument, the module supports compliance workflows aligned with ISO/IEC 17025-accredited metrology laboratories when integrated into traceable optical frequency comb systems. Its passive, non-adjustable optical path eliminates calibration drift, facilitating long-term stability required in GLP-compliant time-frequency experiments and NIST-traceable optical synthesizer architectures.
Software & Data Management
The COSMO module operates as a hardware-level signal transducer: it produces an analog RF output proportional to fCEO, requiring no onboard firmware or driver software. Integration with data acquisition systems (e.g., Keysight PXIe, Zurich Instruments HF2LI, or Stanford Research Systems SR865) is achieved via standard SMA-RF interfacing. When deployed in closed-loop stabilization setups, the module’s output feeds directly into commercial lock-in amplifiers or digital phase-locked loops supporting IEEE 1588 PTP or GPS-disciplined timing references. For auditability in regulated environments (e.g., FDA 21 CFR Part 11–aligned quantum sensor development), users are advised to log raw RF spectra and feedback actuator voltages using timestamped, checksummed binary acquisition formats compliant with HDF5 or ASAM MDF4 standards.
Applications
- Stabilization of Er-fiber-based optical frequency combs for primary frequency standards and optical clock comparisons
- Real-time monitoring of fCEO drift in field-deployable comb systems used in satellite-based optical links and geodesy
- Integration into dual-comb spectrometers requiring simultaneous frep and fCEO control
- Education and R&D platforms for teaching ultrafast optics, nonlinear frequency conversion, and coherent metrology
- Front-end detection stage in multi-channel comb synthesizers targeting mid-IR molecular fingerprinting (via difference-frequency generation seeding)
FAQ
What laser specifications are required to operate the COSMO module?
The module requires femtosecond pulses centered near 1560 nm, with pulse energy >200 pJ, repetition rate typically between 100 MHz and 2.5 GHz, and sufficient coherence for octave-spanning spectral broadening.
Can the COSMO module be used with Yb-fiber or Ti:sapphire lasers?
No—it is specifically optimized for Er-doped fiber lasers near 1560 nm. For other pump wavelengths, custom waveguide dispersion engineering would be necessary.
Is the output signal AC-coupled or DC-coupled?
The SMA output is AC-coupled with a nominal bandwidth of 10 kHz–200 MHz, appropriate for detecting fCEO signals in the 10–250 MHz range.
Does the module include temperature control or active stabilization?
No—thermal management relies on passive conduction through its aluminum housing; no TEC or feedback heaters are integrated.
How is calibration traceability established for fCEO measurements?
Traceability is maintained externally via RF spectrum analyzers calibrated to national standards (e.g., NIST SRM 2810); the COSMO itself functions as a transfer standard with documented SNR and linearity performance.
