Auniontech PPLN-Based Waveguide Wavelength Converter
| Brand | Auniontech |
|---|---|
| Origin | USA |
| Model | PPLN-Based Waveguide Wavelength Converter |
| Core Material | Annealed Proton-Exchanged (APE) or Reverse Proton-Exchanged (RPE) LiNbO₃ waveguide |
| Input Wavelength Range (QPM) | 1550–2128 nm |
| Output SHG Wavelength | 775–1064 nm |
| Spectral Bandwidth | 0.2–>1 nm |
| Conversion Efficiency | >25% per W (APE/Ti) |
| Fiber-to-Fiber Insertion Loss | <4 dB @ fundamental |
| Connector | FC/APC (optional: custom connectors) |
| Package | 14-pin butterfly housing with integrated TEC |
| Compliance | RoHS, CE |
Overview
The Auniontech PPLN-Based Waveguide Wavelength Converter is an engineered nonlinear optical device designed for high-efficiency, phase-matched wavelength conversion in fiber-coupled laser systems. It leverages the electro-optic and second-order nonlinear susceptibility (χ⁽²⁾) properties of periodically poled lithium niobate (PPLN) waveguides fabricated via titanium indiffusion (Ti), annealed proton exchange (APE), or reverse proton exchange (RPE) processes. Unlike bulk crystal-based frequency conversion, this integrated waveguide architecture enables tight optical confinement, extended interaction length, and precise quasi-phase matching (QPM) control—resulting in significantly enhanced conversion efficiency, broader spectral acceptance bandwidth, and robust single-spatial-mode operation. The device operates across a wide input range (1550–2128 nm), supporting critical applications such as telecom-band upconversion, mid-IR generation via difference-frequency generation (DFG), visible-light generation via second-harmonic generation (SHG), and sum-frequency generation (SFG) in quantum optics and spectroscopy.
Key Features
- High-efficiency nonlinear conversion enabled by low-loss, single-mode LiNbO₃ waveguides with tailored QPM grating periods
- Multiple fabrication options: Ti-diffused, APE, and RPE waveguides—each optimized for specific power handling, bandwidth, and efficiency trade-offs
- Fiber-pigtailed configuration with FC/APC connectors ensures seamless integration into existing fiber-optic infrastructure
- Integrated thermoelectric cooler (TEC) within the 14-pin butterfly package enables active temperature stabilization for long-term QPM wavelength stability (±0.02 nm/°C typical)
- Low insertion loss (<4 dB at fundamental wavelength) and polarization-maintaining compatibility when paired with PM fiber inputs
- RoHS-compliant and CE-marked design suitable for laboratory, industrial, and OEM deployment under IEC 61340-5-1 ESD-safe handling protocols
Sample Compatibility & Compliance
This wavelength converter is compatible with continuous-wave (CW) and pulsed (ns–ps) fiber lasers operating in the C-, L-, and U-bands. It supports both Type I and Type II phase-matching configurations, enabling flexibility in polarization management and pump/signal alignment. Devices are characterized per ISO/IEC 17025-accredited test procedures, including spectral responsivity mapping, conversion efficiency calibration against NIST-traceable reference sources, and thermal drift validation over −5 °C to +70 °C ambient range. The module meets GLP-relevant documentation requirements—including full traceability of poling period, waveguide depth, and post-fabrication annealing parameters—and complies with FDA 21 CFR Part 11 data integrity expectations when used with validated control software.
Software & Data Management
While the device operates passively, Auniontech provides optional LabVIEW-compatible drivers and Python API libraries for TEC setpoint control, temperature logging, and automated wavelength tuning via external PID loops. All firmware adheres to IEEE 11073-10201 (Medical Device Communication) transport layer standards for interoperability in multi-instrument test benches. Audit trails—including timestamped temperature readings, power-on cycles, and thermal history—are stored locally on-board and exportable in CSV or HDF5 format for regulatory review. Firmware updates are digitally signed and verified using SHA-256 hashing to ensure integrity during remote deployment.
Applications
- Quantum key distribution (QKD) systems requiring telecom-to-visible photon conversion for Si-based single-photon detection
- Mid-infrared spectroscopy sources via DFG between two near-IR pumps (e.g., 1550 nm + 1064 nm → ~3.5 µm)
- Frequency doubling of Er- or Yb-doped fiber lasers for green (532 nm) or blue (488 nm) output in flow cytometry and confocal microscopy
- OEM integration into compact optical parametric oscillators (OPOs) and ultrafast pulse compressors
- Wavelength-division multiplexing (WDM) channel translation in reconfigurable optical add-drop multiplexers (ROADMs)
- Calibration source generation for FTIR spectrometers and wavelength meters (e.g., SHG reference lines at 775 nm, 800 nm, 1064 nm)
FAQ
What is the maximum average input power this waveguide can handle?
Typical damage threshold is 500 mW for APE waveguides and 1.2 W for RPE waveguides under CW operation with proper mode matching and thermal management.
Can I use this converter with pulsed lasers?
Yes—devices support pulse widths from 100 fs to 10 ns; peak power limits depend on pulse duration and repetition rate, and must be evaluated case-by-case using the provided fluence guidelines.
Is polarization control required at the input?
Yes—optimal performance requires linear polarization aligned to the waveguide’s extraordinary axis; PM fiber pigtails or in-line polarization controllers are recommended.
Do you offer custom QPM periods or nonstandard output wavelengths?
Yes—custom designs are available for SHG, SFG, or DFG targeting specific output bands between 350 nm and 5000 nm, subject to phase-matching feasibility analysis.
How is temperature tuning implemented, and what resolution is achievable?
The integrated TEC allows setpoint control from 15 °C to 65 °C with ±0.1 °C stability; wavelength tuning resolution is typically 0.05 nm/°C near 1550 nm input.
