High power diameter 30um large mode field double clad passive fiber

In the fields of industrial processing, laser weapons, and cutting-edge scientific research, the nonlinear effects and thermal damage of traditional optical fibers severely constrain High power Laser transmission. This product is Diameter 30 μ m  of Large Model Field (LMA) Design as the core, combined with  double cladding Structure and Passive fiber optic Features, breaking through the bottleneck of kilowatt level power, providing the ultimate solution for high-energy photon systems.

1. Disruptive technological architecture

1. Design of 30 μ m large mode field

 Super large field area (>700 μ m ²) significantly reduces power density, suppresses stimulated Brillouin scattering (SBS) and stimulated Raman scattering (SRS), and achieves stable continuous optical transmission of>5 kW.  

 Low numerical aperture (NA ≤ 0.06) Ensure near diffraction limit output (M ²<1.1) to meet the requirements of precision microfabrication.  

2. Double clad high-efficiency pump

Ytterbium doped quartz glass fiber core! With  Pure quartz inner cladding! Form  double envelope Structure, inner cladding adopts  Octagonal geometric design(diameter 400 μ m), eliminating pump blind spots, pump absorption efficiency>96%.  

Fluoropolymer outer layer (NA=0.46) Implement total reflection light constraint to improve brightness conversion efficiency.  

3. Passive fiber reliability

No gain medium design completely avoids Light darkening effect  *Resistant to high temperatures of 300 ℃ (polyimide coating) and supports long-term use High power Run.   When the bending radius is less than 15 cm, the additional loss is less than 0.2 dB/km, which is suitable for complex system wiring. 

2.Extreme performance verification

|Parameter | Indicator Value|

|———————|—————————| 

|Core diameter | * * 30 μ m * * ± 0.5 μ m|

|Peak power density |>500 MW/cm ² (pulse mode)|

|Thermal load threshold |>1 kW/m @ 1070nm|

|Transmission loss | ≤ 1.5 dB/km @ 1064nm|

|Polarization crosstalk |>20 dB (polarization maintaining version optional)|

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3.Core application scenarios

-Industrial 10000 watt laser: used for cutting and welding stainless steel/ceramics, with a 30 μ m large mode field to ensure beam quality

 Directed Energy Weapon System : Double clad structure achieves efficient beam combining of multiple lasers

 Ultra fast pulse compression : Supports<100 fs pulse width transmission under passive fiber architecture

-Medical High Energy Laser: Accurate Energy Delivery for Ophthalmic Surgery and Skin Treatment

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4.Materials and Certification

5.Core Material : Rare Earth Doped * * Quartz Glass  (Yb ³ ⁺/Er ³ ⁺ optional)

-Coating scheme: High temperature resistant polyimide or composite acrylic ester

Standard certification : IEC 60793-2-50 (Class B), MIL-STD-810H vibration test

Summary of Technical Value:

This product breaks through the nonlinear limit through the design of a large mode field with a diameter of 30 μ m, and relies on double clad pumping to improve energy conversion efficiencyPassive fiber optic Architecture ensures kilowatt level High power Long term reliability. It redefines the high-energy laser transmission standard and provides a “zero compromise” optical transmission backbone for cutting-edge optoelectronic systems.  

Keywords:

Double clad fiber,High power optical fiber,large-mode-area fiber,Passive Fiber,