Keopsys CVFA/CYFA/CFAL Series Fiber Amplifiers
| Brand | Keopsys |
|---|---|
| Origin | France |
| Model Series | CVFA (Visible), CYFA (1 µm), CFAL (C-band & L-band), C-Band Pulsed & Bidirectional Amplifiers |
| Wavelength Coverage | 400–700 nm (CVFA), 1030–1080 nm (CYFA), 1525–1565 nm (C-band), 1570–1610 nm (L-band) |
| Output Power Range | Up to +30 dBm (1 W) CW |
| Small-Signal Gain | Up to 45 dB |
| Compliance | CE, RoHS, IEC 61300-3-35 (Fiber Optic Device Reliability) |
Overview
The Keopsys CVFA, CYFA, and CFAL series of fiber amplifiers are engineered for precision optical signal boosting across critical spectral windows used in advanced photonics research and industrial metrology. Based on doped-fiber amplifier architecture—employing ytterbium (Yb³⁺), erbium (Er³⁺), thulium (Tm³⁺), or co-doped Er/Yb gain media—these devices operate under rigorous pump-laser–driven population inversion principles. Each series is thermally stabilized, polarization-controlled where specified, and optimized for low noise figure (<5 dB typical), high gain flatness (±0.5 dB over designated bandwidth), and long-term amplitude stability (<±0.05 dB over 8 hours). Designed for integration into turnkey laser systems, quantum testbeds, and field-deployable sensing platforms, they meet the stringent demands of laboratory-grade reproducibility and OEM system embedding.
Key Features
- Multi-wavelength platform: Dedicated amplification modules covering visible (400–700 nm), 1 µm (1030–1080 nm), C-band (1525–1565 nm), L-band (1570–1610 nm), and pulsed C-band operation
- Configurable output power: Continuous-wave models deliver +10 to +30 dBm; pulsed variants support ns–ps pulse widths with peak power >1 kW
- Low-noise pre-amplifier variants (NF <4.5 dB) for quantum-limited detection in optical heterodyne receivers and squeezed-light experiments
- Integrated monitoring: Real-time photodiode-based input/output power feedback, TEC temperature stabilization (±0.1 °C), and analog/digital status interfaces (RS-232, USB, optional Ethernet)
- OEM-ready packaging: Compact 19″ rack-mount or benchtop chassis options; fiber-pigtailed (PM or SM) with FC/APC or FC/PC connectors; MIL-STD-810G compliant mechanical housing available
- Compliance-ready firmware: Supports audit trails, user-access levels, and configuration logging—aligned with GLP/GMP documentation requirements for regulated optical testing environments
Sample Compatibility & Compliance
These amplifiers accept free-space-coupled or fiber-pigtailed inputs with standard single-mode (SMF-28, HI1060) or polarization-maintaining (PANDA, PM980) fibers. Input power ranges span –30 dBm to +10 dBm depending on model; saturation behavior is characterized per ITU-T G.663 and IEC 61290-2-1. All units conform to CE marking directives (2014/30/EU EMC, 2014/35/EU LVD), RoHS 2015/863, and laser safety Class 1M or Class 3B per IEC 60825-1:2014. For applications requiring traceable calibration—such as optical time-domain reflectometry (OTDR) reference chains or interferometric sensor networks—Keopsys provides factory calibration reports traceable to NIST or LNE standards upon request.
Software & Data Management
Amplifier operation is managed via Keopsys’ proprietary K-AMP Control Suite, a cross-platform application supporting Windows, Linux, and macOS. The suite enables real-time parameter adjustment (gain setpoint, pump current, TEC setpoint), automated sweep routines (wavelength-dependent gain profiling), and data export in CSV/HDF5 formats compatible with MATLAB, Python (NumPy/Pandas), and LabVIEW. Firmware supports SCPI command syntax for seamless integration into automated test systems (ATE). Audit logs—including timestamped configuration changes, thermal history, and fault events—are stored onboard and exportable for FDA 21 CFR Part 11–compliant environments when paired with validated user authentication and electronic signature modules.
Applications
- Quantum optics: Pre-amplification of weak heralded photons in entanglement distribution; seeding of optical parametric oscillators (OPOs); phase-stable amplification for atom interferometry and optical lattice clocks
- Sensing & metrology: Boosting return signals in coherent Doppler LIDAR (wind profiling, aerosol backscatter), fiber-optic gyroscopes (FOGs), and distributed acoustic sensing (DAS) systems
- Telecom & datacom: In-line amplification in DWDM metro/core networks; CATV/FTTH node amplification; bidirectional repeater functionality for passive optical networks (PON)
- Industrial & scientific lasers: MOPA-stage amplification for ultrafast fiber lasers; pumping of mid-IR OPG/OPA sources; high-fidelity amplification of narrow-linewidth lasers for spectroscopy and optical frequency combs
- Defense & aerospace: Free-space optical communication terminals; ruggedized amplifiers for UAV-borne LIDAR; radiation-tolerant variants available for space-qualified payloads (per ECSS-Q-ST-60-13C)
FAQ
What wavelength bands does the Keopsys amplifier portfolio cover?
The CVFA series operates from 400–700 nm (visible), CYFA at 1030–1080 nm, CFAL-C at 1525–1565 nm, and CFAL-L at 1570–1610 nm. Pulsed and bidirectional variants are available exclusively in the C-band.
Can these amplifiers be integrated into automated test systems?
Yes—SCPI-compliant serial and USB interfaces enable full remote control and synchronization with PXI, GPIB, or Ethernet-based ATE platforms.
Do Keopsys fiber amplifiers support polarization-maintaining operation?
Select models (e.g., CVFA-PM, CYFA-PM, CFAL-C-PM) feature PM fiber pigtails with extinction ratios >25 dB and angular alignment within ±1°.
Is calibration documentation provided with each unit?
Standard shipment includes a factory test report with gain vs. wavelength, noise figure, and power stability measurements. NIST-traceable calibration certificates are available as an option.
Are there versions qualified for space or high-reliability environments?
Yes—radiation-hardened and extended-temperature (-40 °C to +70 °C) variants comply with MIL-STD-883 and ECSS-Q-ST-60-13C, with full burn-in and life-test data available upon request.
