Smart Product Number: LMA-TDF-25P/250-LC
Eye Safe 25P/250 Thulium-Doped LMA Double Clad Fiber
The first true LMA fibers featuring a unique low NA (0.1) Tm-doped core design and fully optimized for high slope efficiency when pumped at 793 nm. This extraordinary efficiency is due to composition enabled cross relaxation of Thulium ions in the core. Both fibers fearure a 25 µm core and a 250 µm clad daimeter design allowing for a large mode field diameter and short device lengths thereby minimizing non-linear effects such as SBS and SRS. The - HE fiber features a high Tm-concentration with high pump conversion efficiency optimized for operation in the higher 2 µm wavelength gain spectrum. The -LC fiber features a lower concentration Tm-concentration that operates in the shorter wavelength region of the gain spectrum with improved performance.
Optical Specifications
Operating Wavelength
1900 – 2100 nm
Core NA
0.090
First Cladding NA (5%) ≥ 0.460
Cladding Attenuation
≤ 15 dB/km @ 860 nm
Cladding Absorption
1.00 ± 0.20 dB/m at 1180 nm
3.00 dB/m at 793 nm
Geometrical & Mechanical Specifications
Cladding Diameter
250.0 ± 5.0 µm
Core Diameter
25.0 ± 2.0 µm
Coating Diameter
395.0 ± 15.0 µm
Coating Material
Low Index Acrylate
Prooftest Level
≥ 100 kpsi (0.7 GN/m²)
Comments
Coating Requirements: Low index polymer
The passive version of each fiber is also available.
Features & Benefits
NuCOAT fluoroacrylate coating — Greater fiber durability in extreme environmental operating & storage conditions
Unique low NA Tm-doped core design — Robust single-mode beam quality
Optimized composition for 793nm pumping — Very high conversion efficiency
High pump absorption — Short fiber length, efficient lasing in the ~2µm l window
All fiber proof tested to > 100 kpsi — Critical for ensuring long term reliability when coiling
Typical Applications
Eye Safe (~2µm) lasers and amplifiers
Military and commercial lidar
~2µm output TEM00 fiber lasers for pumping solid state crystal lasers
High peak power pulsed fiber amplifiers
商品属性 [波长] 1900 - 2100 nm [掺杂类型] Tm [芯径大小] 25 µm [首包层直径] 250 µm [数值孔径] 0.090 [光学包层] Double