Thorlabs SPL-HLS Handheld Fiber-Coupled Laser Source
| Brand | Thorlabs |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Product Origin | Imported |
| Model | SPL-HLS |
| Wavelength | 635 nm |
| Output Power (CW Low/High) | ~1 mW / ≥2.5 mW |
| Pulsed Output | ≥2.5 mW at 2 Hz, 50% duty cycle |
| Power Stability | ≤1% |
| Laser Class | 3R |
| Fiber Connector | FC/PC |
| Dimensions | 147.2 × 78.7 × 34.5 mm |
| Operating Temperature | 4–45 °C |
| Battery | NiMH, 3.6 V, >8 h runtime, ~60 days standby |
| Charge Time | ~135 min |
| DC Input | 9 VDC, 2 A |
| AC Adapter | 90–264 VAC, 47–63 Hz, 18 W max output |
Overview
The Thorlabs SPL-HLS Handheld Fiber-Coupled Laser Source is a compact, battery-operated alignment and calibration tool engineered for precision optical setup in field and laboratory environments. Based on a stabilized 635 nm red diode laser, it delivers collimated, single-mode output via an integrated LPS-635 pigtailed fiber with FC/PC connector—ensuring consistent coupling efficiency and minimal mode distortion. Its operation adheres to the fundamental principles of semiconductor laser emission and active power regulation via internal photodiode feedback, enabling high reproducibility across power modes. Designed explicitly for portable beam alignment, interferometer setup, fiber continuity verification, and optical path validation, the SPL-HLS meets the functional requirements of ISO/IEC 17025-accredited calibration labs and R&D facilities where traceable, repeatable visible-light sources are essential.
Key Features
- Three operational modes: continuous-wave low power (~1 mW), continuous-wave high power (≥2.5 mW), and pulsed mode (≥2.5 mW peak, 2 Hz, 50% duty cycle) — selectable via front-panel switch with LED status indicator
- Active automatic power control (APC) circuitry ensures ≤1% RMS power stability over time and temperature (4–45 °C operating range)
- Integrated rechargeable NiMH battery (3.6 V) supports >8 hours of continuous operation and ~60 days of standby; charge temperature range: 10–38 °C; full recharge time: ~135 minutes
- Compact ergonomic housing (147.2 × 78.7 × 34.5 mm) with integrated support stand and red rubber protective boot for impact resistance and secure tabletop placement
- Universal AC adapter compatible with global mains (90–264 VAC, 47–63 Hz); regulated 9 VDC, 2 A output powers both laser and charging circuitry
- Laser safety compliance: Class 3R per IEC 60825-1:2014 and FDA 21 CFR Part 1040.10; includes aperture labeling, interlock-ready design, and built-in emission indicator
Sample Compatibility & Compliance
The SPL-HLS couples seamlessly into standard single-mode fibers (SMF-28 type) via its factory-terminated LPS-635 pigtail and FC/PC interface, supporting alignment with collimators, isolators, circulators, and wavelength division multiplexers. It is routinely deployed in setups requiring ANSI Z136.1-compliant visible alignment beams—including free-space optical benches, fiber-optic sensor characterization rigs, and OEM subsystem integration. The device conforms to electromagnetic compatibility standards per FCC Part 15 Subpart B (Class B) and CE marking directives (2014/30/EU, 2014/35/EU). Its mechanical and thermal specifications align with MIL-STD-810G methods for shock and vibration tolerance during transport and field use.
Software & Data Management
While the SPL-HLS operates as a standalone hardware source without embedded firmware or USB connectivity, its stable output enables integration into automated test systems via external TTL-triggered pulse synchronization (via optional breakout cable). All operational parameters—including mode selection, battery state, and thermal status—are indicated through discrete front-panel LEDs. For quality assurance documentation, Thorlabs provides full traceable calibration certificates (NIST-traceable power meter verification), batch-specific laser diode lifetime data, and compliance reports aligned with GLP audit requirements. Device logs and usage history can be maintained externally using LabVIEW, Python (PyVISA), or MATLAB-based DAQ frameworks interfaced via digital I/O modules.
Applications
- Free-space optical alignment in interferometry, holography, and adaptive optics testbeds
- Fiber-optic component insertion loss measurement and connector end-face inspection
- Calibration of photodetectors, CCD/CMOS sensors, and spectrometer entrance slits
- Education and training labs for laser safety protocols, beam propagation, and fiber coupling fundamentals
- Field service verification of telecom patch panels, passive optical networks (PON), and FTTH drop cables
- Integration into portable OCT probe alignment fixtures and biomedical optical coherence tomography development platforms
FAQ
Is the SPL-HLS compliant with FDA 21 CFR Part 1040.10 for laser products?
Yes — the device is certified as Class 3R under FDA regulations and carries appropriate labeling, emission indicators, and safety interlock provisions.
Can the FC/PC fiber output be replaced with FC/APC or SMA connectors?
No — the LPS-635 pigtail is factory-terminated and not user-replaceable; custom configurations require direct ordering from Thorlabs’ OEM services group.
What is the expected laser diode lifetime under normal operating conditions?
Based on accelerated life testing per Telcordia GR-468-CORE, median operational lifetime exceeds 25,000 hours at 25 °C case temperature and rated drive current.
Does the unit support analog modulation or external trigger input?
The standard SPL-HLS does not include analog modulation capability; however, the pulsed mode may be synchronized externally using TTL-level signals via an optional accessory interface board (sold separately).
Is battery replacement user-serviceable?
Battery replacement requires disassembly by authorized Thorlabs service centers to maintain IP rating integrity and laser safety certification; end users should contact Thorlabs Technical Support for return authorization.
