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445 nm 4 W Fiber-Coupled Blue Laser Diode

445 nm 4 W Fiber-Coupled Blue Laser Diode

WAVELENGTH

445 nm

POWER

4 W

FIBER CORE

105 µm

NA

0.22

Key features

• 445 nm Blue Output
• Reliable 4 W CW Performance
• Narrow 105 µm Fiber Core
• Industrial Standard Configuration
• Advanced Thermal Management

Applications

• 3D Printing
• Additive Manufacturing
• Micro-Materials Processing
• Technical Illumination & Display
• Scientific & Biophotonics Research

Product datasheet

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Custom configurations & wavelengths available

Uncompromising performance

The 445 nm 4 W Fiber Coupled Diode Laser is a high-brightness visible blue light source engineered for meticulous industrial, medical, and scientific applications. Operating in the 445 nm blue spectrum, this module provides superior energy absorption in non-ferrous metals and polymers, enabling high-precision micro-welding and high-resolution thermal marking that standard infrared lasers cannot achieve. Delivering a stable 4 W of continuous-wave output through a fine 105 µm fiber core, the K445 series is built for absolute beam quality and energy density. Featuring a rugged industrial-grade package and an optimized thermal architecture, this module ensures consistent performance under rigorous laboratory and OEM environments. It is the definitive choice for Selective Laser Melting (SLM), high-visibility technical illumination, and advanced biophotonics research where spectral reliability is paramount.

SPECIFICATIONS ( 25°C ) SYMBOL UNIT K445H03FN-4.000WN0N-10522
MINIMUM TYPICAL MAXIMUM
OPTICAL
DATA(1)		 CW Output Power Po W 4 — —
Center Wavelength λc nm 445 ± 20
Spectral Width (FWHM) Δλ nm — 6 —
Wavelength Shift / Temp Δλ/ΔT nm/°C — 0.1 —
ELECTRICAL
DATA		 Electrical-to-Optical Efficiency PE % — 23 —
Threshold Current Ith A — 0.3 —
Operating Current Iop A — 2.8 3.5
Operating Voltage Vop V — 4.5 5.0
FIBER
DATA		 Core Diameter Dcore μm — 105 —
Numerical Aperture NA — — 0.22 —
Minimum Bending Radius — mm 45 — —
OTHERS ESD Vesd V — — 500
Storage Temperature(2) Tst °C -20 — 70
Operating Case Temp(3) Ttop °C 15 — 35
Relative Humidity RH % 15 — 75
(1) Data measured under operation output at 4W @ 25°C.
(2) A non-condensing environment is required for operation and storage.
(3) Operating temperature defined by the package case. Acceptable range is 15°C~35°C, but performance may vary.

Do you need a custom laser diode for your application?

We offer custom laser diodes according to your needs, either high-power or low-power versions, fiber-coupled or free-space, specific wavelengths, wavelength-stabilized options, and single or multi-emitter diodes. To discuss your custom laser diode needs, you can contact us by sending an email or using the contact form.

contact@ephotonics.com

+1 418 883 7125

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