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Description

PhotonTec Berlin GmbH presents a cutting-edge solution in laser technology with the Model M878.6±0.5-40-D200/22-T4M. This high-performance industrial laser diode is designed to meet the demanding needs of advanced applications. Engineered with precision, it offers a robust output power of 40 watts, ensuring reliable performance for your integration projects.

The laser operates at a central wavelength of 878.6 nm, with a tightly controlled spectral width of 0.5 nm, ensuring consistent and precise results. The device is equipped with a fiber receptacle featuring a 200 µm core diameter and a numerical aperture of 0.22, connected via an SMA905 fiber connector. This configuration provides optimal light transmission and integration flexibility.

Designed for efficiency, the laser diode boasts a slope efficiency of 3.8 W/A and a power conversion efficiency of 45%. It operates within a voltage range of 7.19 to 7.25 volts, with an operating current up to 12.5 A, making it a powerful yet energy-efficient choice for industrial applications. The device's threshold current is a mere 1.4 A, underscoring its efficiency and performance capabilities.

Note: This laser is an OEM version intended for integration into other equipment and does not comply with IEC and CDRH requirements. It is the responsibility of the customer to ensure that the system incorporating this laser meets all relevant certifications and regulatory standards.

878.6nm 40W Wavelength-Stabilized Fiber-Coupled Diode Laser

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Specifications

Laser Type: Continuous Wave (CW), Modulated
Fiber Type: Multi-Mode
Wavelength: 878.6 nm
Output Power: 40000 mW
Fiber Core Diamater: 200 um
Spectral Width (FWHM): 0.5 nm
Wavelength Temp. Coefficient: 0.02 nm/°C
Wavelength Current Coefficient: 0.05 nm/A
Numerical Aperture: 0.22
Fiber Connector: SMA905
Threshold Current: 1.4 A
Operating Current: 12.0 - 12.5 A
Operating Voltage: 7.19 - 7.25 V
Slope Efficiency: 3.8 W/A
Power Conversion Efficiency: 45 %
Operating Temperature (baseplate): 20 – 30 °C
Operating Humidity: < 75 %
Storage Temperature: -20 – +80 °C

Got questions about specs? Use the inquiry form to ask.

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Features

  • High Optical Output Power – 40 W at 878.6 nm
    Delivers up to 40 W continuous-wave output, providing ample pump power for solid-state lasers, materials processing, and demanding industrial applications.
  • Narrow-Band Emission at 878.6 ± 0.5 nm
    Center wavelength of 878.6 nm with a typical spectral width of only 0.5 nm (FWHM), ideal for efficient, low-loss pumping of Nd-doped and other compatible laser media.
  • Excellent Wavelength Stability
    Low wavelength temperature coefficient of 0.02 nm/°C and current coefficient of 0.05 nm/A help maintain stable emission wavelength under varying operating conditions when properly temperature-controlled.
  • 200 µm, 0.22 NA Fiber-Coupled Output
    Integrated fiber delivery with 200 µm core and 0.22 numerical aperture enables easy coupling into optical systems, simplifying alignment and system integration.
  • Standard SMA905 Fiber Connector
    Uses widely adopted SMA905 fiber connector for straightforward connection to compatible fiber cables and pump delivery systems, reducing integration time.
  • High Electrical-to-Optical Efficiency – 45% PCE
    Power conversion efficiency of approximately 45% minimizes electrical power consumption and thermal load, supporting compact and cost-effective system designs.
  • Robust Electrical Performance
    Typical operating current of 12.0–12.5 A at ~7.2 V with a threshold current of only 1.4 A and a high slope efficiency of 3.8 W/A for fast power scaling and precise control.
  • Optimized for Industrial OEM Integration
    OEM laser diode module designed to be built into higher-level systems such as fiber lasers, DPSS lasers, and industrial tools, giving system builders flexibility in meeting IEC and CDRH requirements.
  • Compact, Temperature-Controlled Operation
    Specified baseplate operating temperature range of 20–30 °C allows efficient heat removal with standard TEC or water-cooled mounts, improving long-term reliability.
  • Wide Storage Temperature Range
    Storage temperature range from -20 °C to +80 °C supports safe shipping and warehousing, important for global OEM supply chains.
  • Designed for Demanding Industrial Environments
    Operating humidity below 75% and robust packaging support reliable performance in typical laboratory and industrial environments when used with appropriate thermal and ESD management.
  • Suitable for Pumping and Direct Diode Applications
    Wavelength and power level are well suited for pumping Nd-based gain media, diode-pumped solid-state lasers, and for direct diode uses such as IR illumination, heating, and materials pre-processing.
  • Easy Electrical Connection
    Simple 2-pin electrical interface (laser diode anode and cathode) streamlines driver connection and integration with commercial laser diode controllers.

Applications

  • Diode‑pumped solid‑state (DPSS) laser pumping – 878.6 nm wavelength closely matches absorption bands of neodymium-doped crystals (e.g., Nd:YVO4, Nd:YAG, Nd:GdVO4), enabling efficient, low‑thermal‑load end‑pumping and side‑pumping architectures for compact CW or quasi‑CW lasers.
  • Fiber laser and fiber amplifier pumping – Suitable as a pump source for Yb‑ or Nd‑doped fiber lasers and amplifiers that can utilize the 878–880 nm absorption band for high‑brightness, high‑efficiency operation in industrial and scientific fiber laser systems.
  • High‑power CW laser modules and OEM laser engines – Integration into multi‑diode pump modules, laser heads, and OEM laser engines for materials processing, medical, and scientific instruments requiring stable 40 W class pump power via 200 µm / NA 0.22 fiber.
  • Industrial materials processing (indirect pumping) – Use as a pump diode in DPSS or fiber laser systems for cutting, marking, micro‑machining, scribing, drilling, and welding of metals, semiconductors, ceramics, and polymers where the final laser wavelength is generated via the pumped gain medium.
  • Precision micromachining and semiconductor processing – Employed in pump modules driving short‑pulse or CW DPSS/fiber lasers for wafer scribing, IC trimming, via drilling, thin‑film patterning, and OLED / display manufacturing processes.
  • Medical and aesthetic laser systems (pump source) – Integration as a pump laser in medical DPSS or fiber lasers used for dermatology, ophthalmology, dentistry, photocoagulation, and surgical systems where reliability, compactness, and efficient pump coupling are critical.
  • Scientific research and laboratory pump sources – High‑stability pump for laboratory DPSS lasers, tunable OPOs, frequency‑doubled/‑tripled systems, and custom experimental laser setups requiring well‑defined 878 nm excitation.
  • Nonlinear frequency conversion pumping – Pumping of gain media driving nonlinear crystals for second‑, third‑, or higher‑harmonic generation and optical parametric oscillators, where narrowband 878.6 nm pumping improves conversion efficiency and spectral control.
  • Spectroscopy and fluorescence excitation (via pumped lasers) – Use as a pump diode in narrow‑linewidth DPSS lasers or fiber lasers employed for high‑resolution spectroscopy, fluorescence excitation, Raman spectroscopy, and pump–probe experiments.
  • Metrology and precision instrumentation – Pumping stabilized reference lasers and frequency‑locked DPSS sources used in interferometry, dimensional metrology, optical clocks, and frequency combs that require low‑noise, thermally stable pump power.
  • Laser cooling and trapping (indirect) – Integration into pump units for DPSS or fiber lasers that provide specific wavelengths used in atomic, molecular, and optical (AMO) physics experiments such as laser cooling, trapping, and precision measurement.
  • Seeded and MOPA laser architectures – Serving as the pump stage in master‑oscillator–power‑amplifier (MOPA) systems where single‑frequency or narrow‑linewidth seed lasers are power‑scaled for industrial or scientific use.
  • Multi‑watt OEM modules for integration – Embedded in compact OEM pump modules used by laser manufacturers and system integrators in custom laser platforms, laboratory instruments, and analytical devices.
  • High‑brightness fiber‑coupled illumination – Use as a high‑power, fiber‑delivered illumination source for specialized machine vision, inspection, and alignment systems where NIR illumination at ~878 nm is acceptable and eye‑safety is managed at the system level.
  • Test and calibration of high‑power optics and fiber components – Acting as a stable CW source to test power handling of fibers, connectors (SMA905), collimators, isolators, and other 800–900 nm optical components.
  • Reliability and lifetime testing platforms – Employed by research labs and OEMs for accelerated lifetime testing, thermal management studies, and reliability qualification of laser diode drivers, fiber couplers, and cooling systems.
  • Pump source for custom wavelength‑converted systems – Integration into systems where the 878.6 nm radiation is internally converted or mixed to other spectral regions (visible, UV, mid‑IR) for niche industrial, medical, or research applications.
  • Educational and R&D demonstrators – Use in university and institute setups to demonstrate high‑power diode pumping, fiber coupling, and thermal management techniques in advanced photonics and laser engineering courses.

Frequently Asked Questions

What is the PhotonTec Berlin 878.6 nm, 40 W fiber-coupled laser diode module used for?
This module (model M878.6±0.5-40-D200/22-T4M) is a high‑power, fiber‑coupled laser diode at ~878.6 nm delivering 40 W through a 200 µm core fiber with 0.22 NA and SMA905 connector. Lasers in the 870–880 nm range are commonly used for pumping Nd:YVO4 / Nd:YAG lasers, materials processing (plastic welding, soldering, cladding), medical and aesthetic systems, printing and illumination, and as OEM pump or excitation sources in scientific and industrial equipment.
What are the key optical and electrical specifications of this 878 nm, 40 W laser diode?
Key specifications from the datasheet: output power 40 W (fiber‑coupled), center wavelength 878.1–879.1 nm (878.6 nm typical), spectral width ≤0.5 nm (FWHM), wavelength temp. coefficient ~0.02 nm/°C, wavelength current coefficient ~0.05 nm/A. Fiber: 200 µm core, NA 0.22, SMA905 connector. Electrical: threshold current ~1.4 A, operating current 12.0–12.5 A, operating voltage 7.19–7.25 V, slope efficiency ~3.8 W/A, power conversion efficiency ~45%. These values are in line with comparable 40 W, 878–880 nm fiber‑coupled pump diodes on FindLight and other vendors.
How should I cool and mount this OEM laser diode module for reliable operation?
The module is specified for a baseplate operating temperature of 20–30 °C, so it must be mounted on a suitably sized, temperature‑controlled heat sink or cold plate, typically with a thermoelectric cooler (TEC) or water‑cooled plate for 40 W class devices. Ensure good thermal contact using thermal interface material and proper clamping torque as recommended for similar fiber‑coupled pump diodes. Maintain ambient operating humidity below 75% and keep the module within −20 to +80 °C when in storage. Active temperature control helps stabilize the wavelength and extend diode lifetime, as is standard practice with comparable 40 W pump lasers.
How does temperature and drive current affect the 878 nm laser wavelength and stability?
The center wavelength shifts with both temperature and current. The wavelength temperature coefficient is ~0.02 nm/°C, meaning an increase of 10 °C shifts the wavelength by about 0.2 nm. The current coefficient is ~0.05 nm/A, so a 5 A change in current shifts the wavelength by about 0.25 nm. The spectral width remains narrow at ~0.5 nm (FWHM) under normal operating conditions. For applications such as diode‑pumped solid‑state (DPSS) laser pumping where wavelength matching is critical, you should use a low‑noise current driver and active temperature control, similar to the way other precision 878–880 nm pump diodes are operated in commercial laser systems.
How do I drive this 40 W laser diode safely and what protections are recommended?
Use a low‑ripple, constant‑current laser diode driver capable of up to at least 12.5 A and ~8–9 V compliance, with slow start/soft‑start and programmable current limit. Avoid operating beyond the specified operating current (12.0–12.5 A typical) and respect the threshold current (~1.4 A). Implement ESD protection, reverse‑polarity protection, and interlocks as you would with other high‑power pump diodes. Never connect or disconnect the SMA905 fiber under power, and avoid sudden current transients, which are a common cause of premature diode failure in similar OEM high‑power laser modules.
What fiber output characteristics and connector does this module provide?
The output is delivered through a multimode fiber with 200 µm core diameter and numerical aperture (NA) of 0.22, terminated with a standard SMA905 connector. This is a common configuration for 40 W class 878–880 nm pump diodes and is compatible with standard SMA905 fiber collimators, couplers, and delivery cables available on FindLight and other optics suppliers. Proper cleaning and handling of the SMA905 connector ferrule and mating optics are important to prevent contamination and power‑induced damage at high power densities.
What safety and regulatory considerations apply to this industrial OEM laser?
This product is an OEM industrial laser diode and does not itself comply with IEC or CDRH (FDA) laser safety standards as a stand‑alone product. As stated in the datasheet, it is intended only for integration into other equipment. The system integrator (customer) is responsible for ensuring the final product meets all applicable IEC 60825‑1, CDRH/FDA 21 CFR 1040.10, and any regional regulations. In practice, this means implementing appropriate enclosures, interlocks, emission indicators, key switches, labeling, and user documentation, similar to other Class 3B/4 systems based on high‑power pump diodes.

Got more questions? Use the inquiry form to ask the supplier directly.

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