TIA-525 Optical-to-Electrical Converter Module by TTI
| Brand | TTI |
|---|---|
| Origin | USA |
| Model | TIA-525 |
| Bandwidth | 20 GHz |
| Wavelength Range | 400–1700 nm |
| Detector Material | InGaAs / Silicon |
| Component Type | Optical Instrument Component |
| Compliance | RoHS-compliant, CE-marked |
Overview
The TIA-525 Optical-to-Electrical (O/E) Converter Module is a high-bandwidth photonic signal conditioning component engineered for precision analog and digital optical link characterization in research, development, and production environments. Based on transimpedance amplifier (TIA) architecture, the module converts incident optical power into a proportional voltage output with minimal phase distortion and high linearity across its full operational bandwidth. Its dual-detector design—integrating both silicon (Si) and indium gallium arsenide (InGaAs) photodiodes—enables seamless spectral coverage from visible (400 nm) through near-infrared (1700 nm), supporting applications in fiber-optic communications (O-band to U-band), ultrafast laser diagnostics, optical time-domain reflectometry (OTDR), and photonic integrated circuit (PIC) testing. The module operates without external biasing or thermal stabilization, delivering stable responsivity under ambient laboratory conditions.
Key Features
- 20 GHz small-signal bandwidth optimized for high-speed pulse and modulated signal detection
- Dual-material photodetector array: Si (400–1000 nm) and InGaAs (900–1700 nm) for broad spectral interoperability
- High responsivity (>0.8 A/W typical at 1310 nm and 1550 nm) with low dark current (<1 nA)
- Integrated transimpedance amplifier with 50 Ω output impedance, compatible with standard RF test equipment (e.g., oscilloscopes, spectrum analyzers, bit error rate testers)
- DC-coupled output with selectable AC/DC coupling mode via onboard jumper configuration
- RoHS-compliant construction and CE marking for use in EU-regulated laboratories and manufacturing facilities
- Compact 2U-height, 19-inch rack-mountable housing with SMA female RF output and FC/PC optical input interface
Sample Compatibility & Compliance
The TIA-525 supports single-mode and multimode fiber inputs (FC/PC connectorized), accommodating standard telecom-grade fibers (SMF-28, MMF-50/125) and custom patch cables with ≤1.5 dB insertion loss. It is routinely deployed in setups requiring traceable optical power measurement per ISO/IEC 17025-accredited calibration protocols. While not a standalone metrology instrument, the module conforms to IEC 61280-2-9 for optical receiver sensitivity testing and supports GLP-aligned documentation workflows when integrated into validated test benches. Its electrical noise floor (<1.2 mVRMS over 10 kHz–20 GHz) meets requirements for low-jitter signal recovery in 100G/400G coherent system validation.
Software & Data Management
The TIA-525 operates as a hardware-transparent analog front-end and does not include embedded firmware or proprietary control software. Output signals are fully compatible with third-party data acquisition systems—including National Instruments PXI platforms, Keysight PathWave, and MATLAB-based real-time analysis toolchains. When used with calibrated reference sources (e.g., NIST-traceable optical attenuators and power meters), it enables repeatable O/E transfer function mapping. Audit trails for calibration and usage history may be maintained externally in accordance with FDA 21 CFR Part 11 requirements when deployed in regulated QC/QA environments, provided the host DAQ system implements electronic signature and change-control functionality.
Applications
- Characterization of high-speed modulators (MZMs, EAMs) and laser diodes in R&D labs
- Bit-error-rate (BER) testing and eye diagram analysis for 100GBASE-LR4 and 400G-ZR optical transceivers
- Time-resolved photoluminescence (TRPL) measurements in semiconductor material studies
- Optical clock recovery and jitter decomposition in serial data link validation
- Calibration reference channel in multi-channel optical sampling oscilloscopes
- Integration into automated test equipment (ATE) for photonic device wafer-level probing
FAQ
Is the TIA-525 suitable for continuous-wave (CW) power measurement?
No—it is designed for dynamic signal detection, not absolute optical power metrology. For CW power quantification, pair it with a NIST-traceable reference photodiode and calibrated power meter.
Can the module operate with polarization-maintaining (PM) fiber inputs?
Yes, provided the PM fiber is terminated with an FC/PC connector and aligned to minimize coupling loss; however, the module itself is polarization-insensitive.
Does the TIA-525 require external power supply or cooling?
It operates from a single +5 V DC supply (±5% tolerance) and generates negligible heat; no active cooling or temperature control is needed.
What is the maximum optical input power before saturation or damage?
The damage threshold is +3 dBm (2 mW) for continuous exposure; saturation begins at approximately −6 dBm for linear operation across full bandwidth.
Is factory recalibration available, and what is the recommended interval?
TTI offers optional recalibration services traceable to NIST standards; annual recalibration is recommended for applications requiring <±0.3 dB amplitude repeatability.
