LMA-TDF-25P/250-M Large-Mode-Area Double-Clad Thulium-Doped Fiber

LMA-TDF-25P/250-M Large-Mode-Area Double-Clad Thulium-Doped Fiber

Supplier
Shconnet
Part Number
LMA-TDF-25P/250-M
Category
Optical Fibers
Origin
China

Coherent/Nufern large-mode-area double-clad thulium-doped fiber combines a low-NA core (NA<0.1) with high thulium concentration for eye-safe2um fiber lasers and amplifiers. LMA-TDF-25P/250-M is optimized for slope efficiency under793nm pumping; the source reports quantum efficiency above130%. Cross relaxation under790nm pumping arises from the proprietary thulium core-doping process. High doping concentration allows shorter laser or amplifier fibers and reduces nonlinear effects such as SBS and SRS. The low-NA core supports only a few propagating laser modes, which is important where a single-mode beam is required. A high-NA (NA=0.46),250um cladding supports efficient coupling of high-power pump light.

Specification Snapshot
Operating Wavelength
1900-2100 nm
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Overview

Coherent/Nufern large-mode-area double-clad thulium-doped fiber combines a low-NA core (NA<0.1) with high thulium concentration for eye-safe2um fiber lasers and amplifiers. LMA-TDF-25P/250-M is optimized for slope efficiency under793nm pumping; the source reports quantum efficiency above130%. Cross relaxation under790nm pumping arises from the proprietary thulium core-doping process. High doping concentration allows shorter laser or amplifier fibers and reduces nonlinear effects such as SBS and SRS. The low-NA core supports only a few propagating laser modes, which is important where a single-mode beam is required. A high-NA (NA=0.46),250um cladding supports efficient coupling of high-power pump light.

Specifications

ParameterValue
Operating Wavelength1900-2100 nm
Core Numerical Aperture0.090±0.010
Cladding Numerical Aperture (5%)≥0.46
Cladding Attenuation @860nm [@860nm;@ 860nm]≤15.0 dB/km
Cladding Pump Absorption @793nm under Normal Conditions [@793nm Under Normal Conditions / Under Normal Conditions; @ 793nm Under Normal Conditions]6.30 dB/m
Cladding Pump Absorption @1180nm [@1180nm;@ 1180nm]2.10±0.30 dB/m
Core Diameter24.0±1.5 μm
Cladding Diameter (Flat to Flat) [flat to flat]250.0±5.0 μm
Coating Diameter395.0±15.0 μm
Core/Cladding Concentricity Error≤2.0 μm
Coating MaterialLow-Refractive-Index Polyester
Proof Test Level≥100kpsi (0.7GN/m2)

Applications

High-power eye-safe~2um CW or pulsed fiber lasers and amplifiers; industrial and medical fiber lasers; military and commercial lidar;~2um TEM00 fiber lasers for pumping solid-state crystal lasers; high-peak-power pulsed fiber amplifiers.

Key Features

Fluorinated NuCOAT coating improves durability under extreme operating and storage conditions. A low-NA thulium-doped core provides single-mode output-beam quality. Optimized for793nm pumping and high conversion efficiency. High pump absorption enables~2um laser output from shorter fiber lengths. Proof strength above100kpsi supports long-term reliability when coiled.

Datasheet

Product Datasheet
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Supplier Information

Sh
Shconnet
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Shanghai Connet Fiber Communication Technology Co., Ltd. was founded in 2003 and is a high-tech enterprise specializing in the research, development, and production of laser light sources, fiber lasers, fiber amplifiers, and related products. Currently, the company has formed four major series of products led by laser light sources, fiber lasers, fiber amplifiers, and fiber gratings, including laser light sources of various wavelengths, single-frequency lasers, high-power fiber amplifiers, single-frequency polarization-maintaining fiber amplifiers, continuous and pulsed fiber lasers, high-power fiber gratings, phase-shifted gratings, chirped gratings, and other related products, providing innovative products and solutions for the research and development of high-performance fiber lasers, LiDAR, fiber sensing, fiber communication, test and measurement, scientific research, and other fields. Shanghai Connet is committed to continuously providing globally leading technologies and products, serving fields including: special fiber applications, fiber laser research and industrialization, fiber sensing and fiber optic gyroscope research, LiDAR applications, and laser industrial applications. The philosophy of Shanghai Connet Fiber Communication Technology Co., Ltd. is: continuously introducing globally leading technologies and products, and fully providing support and assistance to domestic users. After years of accumulation and development, the company has formed a series of products led by single-frequency fiber lasers, pulsed fiber laser light sources, high-power fiber amplifiers, and special fiber lasers, providing innovative product solutions for LiDAR, fiber sensing, coherent and spectral synthesis, research, testing and measurement of high-performance fiber lasers, spectral analysis, fiber communication, and other fields. Shanghai Connet Laser Technology Co., Ltd. is a wholly-owned subsidiary of Shanghai Connet Fiber Communication Technology Co., Ltd. It is a high-tech enterprise specializing in the research, development, and production of laser light sources, fiber lasers, fiber amplifiers, and related products, founded in 2007. Since its establishment, Shanghai Connet Laser Technology Co., Ltd. has been guided by technological innovation, committed to providing products and services representing cutting-edge technology and future development trends for scientific research and production applications in industrial lasers, LiDAR, fiber sensing, fiber communication, and other fields. After years of accumulation and development, the company has formed three major series of products led by laser light sources, fiber lasers, and fiber amplifiers, including laser light sources of various wavelengths, high-power fiber amplifiers, single-frequency polarization-maintaining fiber amplifiers, continuous and pulsed fiber lasers, and other related products, providing innovative product solutions for the research and development of high-performance fiber lasers, test and measurement, spectral analysis, coherent synthesis, LiDAR, fiber sensing, fiber communication, and other fields. "Looking to the future, pursuing quality; independent innovation, striving for excellence" is the development philosophy that Shanghai Connet Laser Technology Co., Ltd. has adhered to since its founding. We take quality pursuit as the core, rely on a professional R&D team and advanced concepts, continuously develop and innovate, strive for excellence, and shoulder social responsibility, seeking long-term development.

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