Connet High Power Double-Clad Fiber Bragg Grating

Connet High Power Double-Clad Fiber Bragg Grating (also known as Fiber Laser Cavity Mirror) adopts the classic phase mask engraving technique specially designed for high power CW and pulsed fiber lasers. From Single Mode fiber to Large Mode Area fiber all can be used to written Connet high power FBGs and the power handling capacity can be up to be higher than 3kW.

 

Connet High Power Double-Clad Fiber Bragg Grating pair consist of High Reflector (HR) and Low Reflector (LR). The Low Reflector, also called as Output Coupler (OC), is used to select the working wavelength of the fiber laser. Connet high power FBGs use the chirped phase mask technology to provide the precisely matched HR FBGs and LR FBGs with different bandwidths upon users’ requests.

 

After years of research and development, Connet has mastered the comprehensive technology of high-power kW level Fiber Bragg Gratings including the pretreatment technology of Large Mode Area Double-Clad Fiber, the hydrogen carrying technology of Large Mode Area Double-Clad Fiber, precisely controlled grating engraving technology, the coating and packaging technology of Large Mode Area Double-Clad Fiber Bragg Gratings and the testing technology for high power Large Mode Area Double-Clad Fiber Bragg Gratings.

 

 

Connet High Power Double-Clad Fiber Bragg Gratings can be divided into three main series according to the operating wavelengths:

1.0um Series High Power Double-Clad Fiber Bragg Grating

Fiber Type	3dB Bandwidth (HR)/Reflectivity	3dB Bandwidth (OC)/Reflectivity	Pump Power Handling Capability	Signal Power Handling Capability
20/400	1-4nm/99.5%	0.5-2.0nm/5%-30%	3000W	2000W
20/400	1-4nm/99.5%	0.5-2.0nm/5%-30%	4000W	3000W
22/400	1-4nm/99.5%	0.5-2.0nm/5%-30%	3000W	2000W
25/400	1-4nm/99.5%	0.5-2.0nm/5%-30%	3000W	2000W
14/250	1-4nm/99.5%	0.5-2.0nm/5%-30%	2200W	1500W
10/130	1-4nm/99.5%	0.5-2.0nm/5%-30%	500W	300W

 

1.5um Series High Power Double-Clad Fiber Bragg Grating

Fiber Type	3dB Bandwidth (HR)/Reflectivity	3dB Bandwidth (OC)/Reflectivity	Pump Power Handling Capability	Signal Power Handling Capability
6/125 or 9/125	1-4nm/99.5%	0.5-2.0nm/5%-30%	50W	10W
12/130	1-4nm/99.5%	0.5-2.0nm/5%-30%	100W	20W
25/250 or 25/300	1-4nm/99.5%	0.5-2.0nm/5%-30%	800W	200W
30/250	1-4nm/99.5%	0.5-2.0nm/5%-30%	800W	200W

 

2.0um Series High Power Double-Clad Fiber Bragg Grating

Fiber Type	3dB Bandwidth (HR)/Reflectivity	3dB Bandwidth (OC)/Reflectivity	Pump Power Handling Capability	Signal Power Handling Capability
10/130	1-4nm/99.5%	0.5-2.0nm/5%-30%	300W	50W
25/250	1-4nm/99.5%	0.5-2.0nm/5%-30%	1000W	200W
25/400	1-4nm/99.5%	0.5-2.0nm/5%-30%	1000W	200W

 

Notes: HR/LR FBGs with uniform periods are available for options. The 3dB bandwidth (FWHM) of LR FBGs can be chosen from 0.01nm to 0.3nm.

 

With deep understanding and rich experience on double-clad fiber and fiber laser technology, the High Power Double-Clad Fiber Bragg Grating pairs provided by Connet have the following outstanding features:

• Extremely low temperature rise slope efficiency. Suitable for high power work.

• Optimized design of LR FBGs to reduce the reverse light leakage of HR FBGs.

• Excellent reflection/transmission spectrum to raise the threshold of Stimulated Raman Scattering (SRS).

With more than 10 years cultivation in fiber laser market, Connet has a deep understanding of the fiber laser market. Based on the good domestic market position, Connet has been striving to develop the overseas markets and received great feedbacks from customers. Over many years of research and investment, Connet has fully understood and mastered the core technology of high power double-clad fiber gratings. Connet now can manufacture high power double-clad fiber gratings in batches and also can provide the custom services upon customers’ requirements for different applications.

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