Sapphire fiber single crystal Al₂O₃ high optical transmittance melting point 2072℃ can be used for laser window materials

Short Description:

Sapphire fiber is made of single crystal alumina (Al₂O₃), which is a material with high mechanical strength, chemical resistance and good thermal conductivity. Sapphire belongs to the hexagonal crystal structure, the light transmission range is 0.146.0μm, and has a high optical transmittance in the 3.05.0μm band. The melting point of sapphire is as high as 2072 ° C, and the hardness is second only to diamond, so sapphire fiber has extremely high heat resistance and mechanical strength.

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Preparation process

1. Sapphire fiber is usually prepared by laser heated base method (LHPG). By this method, sapphire fiber with geometric axis and C-axis can be grown, which has good transmittance in near infrared band. The loss mainly comes from scattering caused by crystal defects existing in or on the surface of the fiber.

2. Preparation of silica clad sapphire fiber: First, poly (dimethylsiloxane) coating is set on the surface of sapphire fiber and cured, and then the cured layer is converted into silica at 200 ~ 250℃ to obtain silica clad sapphire fiber. This method has low process temperature, simple operation and high process efficiency.

3.Preparation of sapphire cone fiber: The laser heating base method growth device is used to prepare sapphire cone fiber by controlling the lifting speed of sapphire fiber seed crystal and the feeding speed of sapphire crystal source rod. This method can prepare sapphire conical fiber with different thickness and fine end, which can meet the specific application requirements.

Fiber types and specifications

1.Diameter range: The diameter of sapphire fiber can be selected between 75~500μm to adapt to different application requirements.

2. Conical fiber: Conical sapphire fiber can achieve high light energy transmission while ensuring fiber flexibility. This fiber improves energy transmission efficiency without sacrificing flexibility.

3. Bushings and connectors: For optical fibers with a diameter greater than 100μm, you can choose to use polytetrafluoroethylene (PTFE) bushings or optical fiber connectors for protection or connection.

Application field

1.High temperature fiber sensor: Sapphire fiber because of its high temperature resistance, chemical corrosion resistance, very suitable for fiber sensing in high temperature environment. For example, in metallurgy, chemical industry, heat treatment and other fields, sapphire fiber high temperature sensors can accurately measure temperatures up to 2000 ° C.

2.Laser energy transfer: The high energy transmission characteristics of sapphire fiber make it widely used in the field of laser energy transfer. It can be used as a window material for lasers to withstand high intensity laser radiation and high temperature environments.

3.Industrial temperature measurement: In the field of industrial temperature measurement, sapphire fiber high temperature sensors can provide accurate and stable temperature measurement data, which helps to monitor and control temperature changes in the production process.

4. Scientific research and medical: In the field of scientific research and medical treatment, sapphire fiber is also used in a variety of high-precision optical measurement and sensing applications due to its unique physical and chemical properties.

Technical parameters

Parameter	Description
Diameter	65um
Numerical Aperture	0.2
Wavelength Range	200nm - 2000nm
Attenuation/ Loss	0.5 dB/m
Maximum Power Handling	1w
Thermal Conductivity	35 W/(m·K)

According to the specific needs of customers, XKH provides personalized sapphire fiber custom design services. Whether it is the length and diameter of the fiber, or the special optical performance requirements, XKH can provide customers with the best solution to meet their application needs through professional design and calculation. XKH has advanced sapphire fiber manufacturing technology, including laser heated base method (LHPG), to produce high quality, high performance sapphire fiber. XKH strictly controls every link in the manufacturing process to ensure that product quality and performance meet customer expectations.