976nm 140W Wavelength-Locked Fiber-Coupled Diode Laser K976BN1RN-140.0WN0N-10522F20EFF
The K976BN1RN-140.0W is a high-power, wavelength-locked fiber-coupled diode laser module from BWT. It delivers 140W of output power at a stabilized center wavelength of 976±1nm through a 105μm core / 0.22NA multimode fiber with an FC ferrule. Featuring volume Bragg grating (VBG) wavelength locking, the module achieves a narrow spectral width of 0.6nm (FWHM) and concentrates 90% of its energy within 974.5~977.5nm, making it highly efficient for pumping ytterbium-doped fiber lasers. Built-in anti-reflection protection for the 1020~1200nm band (30dB isolation) safeguards the chip against back-reflected light. Optional thermistor and monitor photodiode pins are available in the compact 80×80×24.8mm package.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Output Power Po (W) | 140 (Min.) |
| Center Wavelength λc (nm) | 976±1nm |
| Spectral Width (FWHM) △λ (nm) | 0.6 (Typ.) / 1.0 (Max.)nm |
| Wavelength Temperature Coefficient △λ/△T (nm/°C) | 0.02 |
| Wavelength Current Coefficient △λ/△I (nm/A) | 0.03 |
| Power in Band (nm) | 90%@974.5~977.5 |
| Power Conversion Efficiency PE (%) | 50% |
| Threshold Current Ith (A) | 0.9A |
| Slope Efficiency η (W/A) | 11.0W/A |
| Fiber Core Diameter Dcore (μm) | 105μm |
| Fiber Cladding Diameter Dclad (μm) | 125μm |
| Numerical Aperture NA | 0.22 |
| Fiber Length Lf (m) | 2m |
| Fiber Jacket Diameter (mm) | 0.9mm |
| Fiber Bend Radius (mm) | 50 (Min.) |
| Fiber Connector | FC bare ferrule |
| Anti-Reflection Wavelength Band (nm) | 1020~1200nm |
| Isolation (dB) | 30dB |
| ESD Vesd (V) | 500 (Max.) |
| Storage Temperature Tst (°C) | -20~70°C |
| Soldering Temperature Tls (°C) | 260 (Max.) |
| Soldering Time t (s) | 10 (Max.) |
| Operating Temperature Top (°C) | 23~27°C |
| Package Dimensions (mm) | 80×80×24.8 |
| Pin 1 | Laser (+) |
| Pin 2 | Laser (-) |
| Pin 3 | - |
| Pin 4 | - |
| Pin 5 | Thermistor (optional) |
| Pin 6 | Thermistor (optional) |
| Pin 7 | Photodiode P (optional) |
| Pin 8 | Photodiode N (optional) |
Applications
Key Features
Datasheet
Supplier Information
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