Hamamatsu L12007-1294H-C Quantum Cascade Laser (QCL)
| Brand | Hamamatsu |
|---|---|
| Origin | Japan |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Import Status | Imported |
| Model | L12007-1294H-C |
| Core Component | Distributed Feedback (DFB) Continuous-Wave Quantum Cascade Laser Diode |
| Peak Emission Wavelength (Typ.) | 7.73 µm |
| Operating Temperature Range (QCL) | 10–50 °C |
| Spectral Linewidth (Max.) | 0.2 cm⁻¹ |
| Wavelength Tuning Range (Min.) | ±1.0 cm⁻¹ |
| Output Power (Min.) | 20 mW |
| Threshold Current (Max.) | 1 A |
| Side Mode Suppression Ratio (Min.) | 25 dB |
| Package Type | HHL (Hermetically Sealed High-Heat-Load) |
| Dimensions | Standard HHL footprint (see datasheet) |
Overview
The Hamamatsu L12007-1294H-C is a distributed feedback (DFB) continuous-wave quantum cascade laser designed for high-stability, narrow-linewidth mid-infrared emission at a nominal wavelength of 7.73 µm. Unlike conventional interband semiconductor lasers, QCLs operate on intersubband transitions within engineered quantum well heterostructures—enabling precise, room-temperature-compatible operation in the 4–12 µm spectral region where fundamental vibrational absorption bands of numerous trace gases (e.g., NO₂, CH₄, CO, N₂O, and volatile organic compounds) reside. This device is engineered for integration into gas sensing platforms requiring high spectral resolution, low drift, and long-term operational repeatability—particularly in extractive and open-path environmental monitoring systems, industrial process control analyzers, and laboratory-grade spectroscopic setups.
Key Features
- DFB architecture ensures single-mode, continuous-wave output with intrinsic wavelength stability and minimal mode-hopping risk under controlled temperature and current conditions.
- Narrow spectral linewidth (<0.2 cm⁻¹) supports high-resolution absorption spectroscopy, including tunable diode laser absorption spectroscopy (TDLAS) and photoacoustic spectroscopy (PAS).
- Hermetically sealed HHL (High-Heat-Load) package provides robust thermal management and long-term reliability in demanding environments—compatible with standard thermoelectric cooler (TEC) mounts and fiber-pigtailed or free-space optical interfaces.
- Wavelength tunability of ±1.0 cm⁻¹ via current modulation enables scanning across target absorption features without mechanical gratings or external cavities.
- Minimum output power of 20 mW at operating temperatures between 10 °C and 50 °C ensures sufficient signal-to-noise ratio for detection limits in the sub-ppb range when paired with appropriate detectors (e.g., mercury cadmium telluride or thermopile sensors).
- Side mode suppression ratio ≥25 dB guarantees clean spectral purity essential for quantitative multi-species analysis and calibration traceability.
Sample Compatibility & Compliance
The L12007-1294H-C is optimized for use with gas cells, multipass absorption cells (e.g., White or Herriott configurations), and photoacoustic resonant chambers. Its 7.73 µm emission aligns with strong C–H and N–O stretching vibrations, making it suitable for detection of hydrocarbons, nitrogen oxides, and fluorinated greenhouse gases. The device complies with RoHS Directive 2011/65/EU and meets IEC 60825-1:2014 safety requirements for Class 3B laser products. When integrated into analytical instrumentation, it supports adherence to ISO 14001 environmental monitoring frameworks and ASTM D6348–15 for gaseous emissions testing. Full traceability documentation—including calibration certificates and spectral characterization reports—is available upon request for GLP/GMP-regulated applications.
Software & Data Management
Hamamatsu provides comprehensive driver firmware and SDKs compatible with Windows and Linux platforms, enabling precise current and temperature control via analog voltage input or digital communication (RS-232/USB). Integration with third-party data acquisition systems (e.g., National Instruments DAQ, Keysight U1242B) allows synchronization with lock-in amplifiers, fast digitizers, or real-time spectral processing engines. All operational parameters—including drive current, TEC setpoint, photodiode monitor output, and internal thermistor readings—are logged with timestamped metadata, supporting audit-ready records compliant with FDA 21 CFR Part 11 when deployed in regulated manufacturing or pharmaceutical QC environments.
Applications
- Real-time, in-situ monitoring of stack emissions and ambient air quality (EPA Method TO-16 compliant configurations)
- Industrial leak detection in petrochemical refineries and semiconductor fabrication cleanrooms
- Isotopic ratio analysis (e.g., ¹³CH₄/¹²CH₄) using high-finesse cavity-enhanced absorption techniques
- Calibration source for Fourier-transform infrared (FTIR) spectrometers and quantum cascade laser spectrometers (QCL-IR)
- Research-grade studies of molecular dynamics, combustion intermediates, and atmospheric chemistry kinetics
FAQ
What is the recommended operating current range for stable DFB operation?
The device operates optimally between 0.8 A and 1.0 A at 25 °C heatsink temperature; exceeding 1.0 A may induce thermal rollover or accelerate degradation.
Can this QCL be fiber-coupled?
Yes—the HHL package includes an integrated collimating lens and is compatible with AR-coated ZnSe or Ge aspheric optics for coupling into mid-IR transmitting fibers (e.g., chalcogenide or hollow-core photonic bandgap fibers). Custom pigtailed versions are available under OEM agreement.
Is temperature stabilization required during spectroscopic measurements?
Yes—sub-0.01 °C temperature stability is recommended to maintain <0.005 cm⁻¹ wavelength drift over 1-hour acquisitions; Hamamatsu’s C11822 series TEC controllers are validated for this purpose.
Does Hamamatsu provide spectral characterization data for individual units?
Yes—each L12007-1294H-C is individually tested and shipped with a certificate of conformance including measured threshold current, slope efficiency, far-field divergence, and wavelength vs. current/temperature maps.
What safety interlocks are supported?
The HHL package includes integrated photodiode monitoring and thermistor feedback channels, enabling hardware-level shutdown triggers via external safety relays compliant with IEC 61508 SIL-2 requirements.
