The Thorlabs LLD1530 is a compact, turnkey frequency-locked laser operating at 1532.8323 nm vacuum wavelength. It stabilizes actively to a NIST-traceable acetylene (C2H2) molecular transition via side-of-fringe locking, delivering frequency accuracy better than ±25 MHz at startup and long-term stability within ±80 fm. The DFB laser diode achieves a Side Mode Suppression Ratio of at least 35 dB and supports both automatic and manual frequency re-locking modes. Front panel LEDs and digital I/O signals provide lock status indication. This system operates across 10 °C to 40 °C and outputs fiber-coupled light through an FC/APC connector, making it suitable for precision metrology, gas sensing, instrument calibration, and dense wavelength division multiplexed telecommunications on the ITU 12.5 GHz grid.
Technical Specifications
• Vacuum Emission Wavelength: 1532.8323 nm
• Laser Type: Distributed Feedback (DFB) laser diode
• Frequency Stabilization: Actively stabilized to NIST-traceable acetylene (C2H2) molecular transition
• Frequency Accuracy (at startup): Better than ±25 MHz
• Frequency Stability: ±25 MHz
• Overall Frequency Accuracy: ±50 MHz
• Long-Term Stability: Within 1532.8323 nm ± 80 fm
• Side Mode Suppression Ratio (SMSR): At least 35 dB
• Locking Technique: Side-of-fringe locking
• Operating Temperature Range: 10 °C to 40 °C
• Mass: 3.68 kg
– Key Features
• Dual operational modes: AUTO (automatic re-locking) and MANUAL (user-triggered re-lock)
• Immediate frequency lock upon startup—no warm-up calibration required
• Front panel LEDs and digital I/O signals for real-time lock status monitoring
• Fiber-coupled output via FC/APC connector
• Digital I/O interface (female DB9 connector) for laser control, mode selection, re-lock triggering, and status reporting
– Typical Applications
• Fourier Transform Infrared (FTIR) instrumentation and reference standards
• Interferometry
• Gas sensing and spectroscopy
• Instrument calibration and metrology
• ITU DWDM telecommunications (195.5875 THz / 12.5 GHz grid slot)
• Coherent telecommunications
– Compatibility & Integration
The LLD1530 is designed as a standalone turnkey system. Integration with external equipment requires compatibility with the DB9 digital I/O interface for command and status exchange.
