Superlum SOA-332 Series Semiconductor Optical Amplifier

Overview

The Superlum SOA-332 Series Semiconductor Optical Amplifier (SOA) is a compact, electrically pumped gain medium designed for integration into fiber-optic systems operating across the visible to near-infrared spectrum (785 nm to 1060 nm). Unlike erbium-doped fiber amplifiers (EDFAs), which rely on rare-earth ion transitions and require pump lasers, SOAs operate on the principle of stimulated emission in a forward-biased semiconductor heterostructure—typically InGaAsP/InP-based quantum-well active regions. This architecture enables direct current injection, fast gain dynamics (sub-nanosecond response), and wavelength agility within defined gain bands. The SOA-332 series is engineered for precision optical signal boosting in low-to-moderate power regimes, with typical small-signal gains ranging from 22 dB to 30 dB and spectral bandwidths spanning 16 nm (e.g., SOA-382-800) to 95 nm (SOA-522 at 1010 nm). Its butterfly package integrates thermoelectric cooling (TEC), monitor photodiode, and polarization-maintaining or single-mode fiber pigtails—ensuring thermal stability, gain reproducibility, and compatibility with polarization-sensitive architectures.

Key Features

• Wavelength-flexible platform covering 785–1060 nm, with discrete models optimized for key telecom and sensing bands (e.g., 800 nm for biomedical OCT, 850 nm for VCSEL-based datacom, 1060 nm for swept-source OCT)
• High gain uniformity and low noise figure (<7 dB typical) achieved through optimized anti-reflection coatings and facet passivation
• Butterfly housing with integrated TEC and thermistor for precise temperature control (±0.1 °C stability), critical for gain flatness and long-term drift mitigation
• Low drive current requirements (160–350 mA), enabling efficient operation in portable or power-constrained systems
• Compact footprint (<25 mm × 12 mm × 7 mm) and hermetic sealing compliant with Telcordia GR-468-CORE reliability standards
• Configurable fiber interface: single-mode (SM) or polarization-maintaining (PM) pigtails, with optional DBUT (Dual Butterfly) packaging for dual-stage or bidirectional configurations

Sample Compatibility & Compliance

The SOA-332 series is compatible with standard SMF-28, HI1060, and PM980 fibers, supporting both free-space coupling and pigtailed integration. Input saturation powers range from −10 dBm to +3 dBm depending on model and wavelength, permitting use in pre-amplifier, in-line, or booster configurations. All units comply with IEC 60825-1:2014 (laser safety Class 1M when enclosed), RoHS 2015/863/EU, and REACH SVHC regulations. Device-level traceability includes full electro-optical characterization reports (L-I-V curves, gain vs. wavelength, ASE spectra, polarization-dependent gain <0.5 dB) per unit, supporting GLP-aligned calibration workflows and audit-ready documentation for R&D labs and ISO/IEC 17025-accredited facilities.

Software & Data Management

While the SOA is a standalone analog component, its operational parameters are fully controllable via external bias controllers (e.g., Thorlabs LDCxx, Wavelength Electronics QCL series) supporting analog voltage/current input and digital interfaces (USB, RS-232, or Modbus RTU). Integration with LabVIEW, Python (PyVISA), or MATLAB enables automated sweep routines—such as gain-vs-current mapping or wavelength-dependent ASE profiling—for system-level characterization. Built-in monitor photodiodes provide real-time feedback for closed-loop current stabilization, essential for maintaining constant gain during extended acquisition sequences in OCT or distributed fiber sensing applications. Firmware-agnostic control ensures compatibility with existing test benches without proprietary lock-in.

Applications

• Fiber-optic sensing: Amplification of weak backscattered signals in OFDR (Optical Frequency Domain Reflectometry) and phase-sensitive OTDR systems
• Biomedical imaging: Enabling high-speed, high-sensitivity swept-source OCT at 800 nm, 840 nm, 1010 nm, and 1060 nm bands
• Quantum optics: Low-noise pre-amplification of heralded single photons in SPDC-based sources
• All-optical signal processing: Implementation of Mach–Zehnder interferometric switches and cross-gain modulation-based wavelength converters
• Test & measurement: Boosting output from tunable laser sources or SLEDs prior to spectral analysis or interferometric calibration

FAQ

What is the maximum input power before gain compression occurs?
Saturation input power (P_sat) varies by model and wavelength—typically −10 dBm for SOA-332 at 785 nm and +1 dBm for SOA-532 at 1060 nm. Exact values are provided in the individual device datasheet.

Can the SOA be operated in pulsed mode?
Yes. The sub-nanosecond carrier lifetime supports gain switching at frequencies up to 1 GHz, enabling use in gated amplification and time-domain multiplexing schemes.

Is polarization-dependent gain (PDG) specified?
All SOA-332 variants exhibit PDG ≤ 0.5 dB under stabilized thermal and current conditions, verified per IEC 61282-5.

Do you provide aging data or MTTF estimates?
Accelerated life testing per Telcordia GR-468-CORE indicates >100,000 hours MTTF at 25 °C case temperature and rated drive current.

Are custom wavelengths or fiber types available?
Yes—Superlum offers tailored SOA designs for non-standard wavelengths (e.g., 760 nm, 940 nm) and specialty fibers (e.g., hollow-core photonic bandgap, fluoride, or mid-IR ZBLAN pigtails) upon request and NRE agreement.