808 nm 40 W Fiber Coupled Laser Diode

WAVELENGTH

808 nm

POWER

40 W

FIBER CORE

106.5 µm

NA

0.22

Key features

• High Power Output
• Tight ±3nm Wavelength Tolerance
• High Efficiency
• 30 dB Feedback Isolation
• Customized Fiber Termination
• Rugged Design

Applications

• Solid-State Laser Pumping
• End-pumped Laser Rods
• Material Processing
• MOPA Fiber Lasers
• Aesthetic & Dermatology
• Medical OEM Integration

Custom configurations & wavelengths available

Uncompromising performance

The K808DN1RN-40.00W is a high-power fiber-coupled laser diode delivering 40W of Continuous Wave (CW) output power at a center wavelength of 808nm (±3nm). This module is distinguished within the 808nm lineup by two unique specifications: a,106.5µm fiber core, slope efficiency of 9 W/A typical**, the highest slope efficiency of any 808nm module in the catalog. These parameters together define a high-brightness pump source with exceptional power conversion per amp of drive current, delivering 40W into a tight 106.5µm aperture from a remarkably low maximum operating current of just 5.5A.The FPT (Flat-Polished Tip) fiber termination, bare fiber or SMA905, provides you to chose whichever convenient for your application. The fiber is housed in 0.9mm PTFE tubing (180cm length), with a 250µm buffer diameter and a 60mm minimum bending radius — the tightest bending radius specification in the 808nm lineup, supporting compact fiber routing in space-constrained OEM laser chassis.The feedback isolation band on this module is specified as **1040–1200nm** (vs. 1020–1200nm on other 808nm modules), making it specifically tuned to block Yb fiber laser signal wavelengths rather than Nd crystal laser wavelengths — confirming the primary target application as Yb-doped fiber laser pumping rather than Nd:YAG solid-state pumping. Both the fiber type and the feedback isolation band can be customized to customer requirements per the datasheet notes.

SPECIFICATIONS ( 25°C )SYMBOLUNITK808DN1RN-40.00W
MINIMUMTYPICALMAXIMUM
OPTICAL
DATA(1)
CW Output PowerPoW40
Center Wavelengthλcnm808 ± 3
Spectral Width (FWHM)Δλnm6
Wavelength Shift / TempΔλ/ΔTnm/°C0.3
ELECTRICAL
DATA
Elec-to-Opt EfficiencyPE%40
Threshold CurrentIthA0.85
Operating CurrentIopA5.5
Operating VoltageVopV20
Slope EfficiencyηW/A9
FIBER
DATA(2)
Core DiameterDcoreµm106.5
Cladding DiameterDcladµm125
Buffer DiameterDbufµm250
Numeric ApertureNA0.22
Total Fiber LengthLfm2
Fiber Loose Tubing0.9mm PTFE, 180cm
Min. Bending Radiusmm60
Fiber TerminationFPT (Flat-Polished Tip)
FEEDBACK
ISOLATION(3)
Wavelength Rangenm1040 ~ 1200
IsolationdB30
OTHERSESDVesdV500
Storage Temperature(4)Tst°C-2070
Lead Soldering TempTls°C260
Lead Soldering Timetsec10
Operating Case TempTop°C1535
Relative HumidityRH%1575

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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