CASTECH INC. _A Leading Photonics Solutions Partner

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Building the Bridge of Light Excellently

Building the Bridge of Light Innovatively

New Products

$Diffraction Gratings for 5G Communication and in Vehicle LiDAR Systems$

Diffraction Gratings for 5G Communication and in Vehicle LiDAR Systems

Optical Assembly

Acousto-Optic Deflectors

Fiber-Coupled Acousto-Optic Modulators

CLBO - Cesium Lithium Borate

Yb:CALGO - Ytterbium Doped Calcium Gadolinium Aluminate

Exhibition Information

CIOE 2025

The 26th China International Optoelectronic Exposition (CIOE 2025) will take place from September 10 to 12, 2025, at the Shenzhen World Exhibition and Convention Center.

2025 Laser World of Photonics

CASTECH will actively participate in the Laser World of Photonics (LWP) in Munich from 24-27 June 2025

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CASTECH INC. Stock code 002222

After 30 years` rapid growth since the foundation in 1990, CASTECH INC. has become a recognized leading supplier of crystals, optics and laser components in the world. In 2008 CASTECH successfully completed IPO in Shenzhen stock exchange. (Stock Code 002222) Today, at our 450,000 sq ft advanced facility, over 1000 employees are dedicating to satisfy customer needs in terms of performance and cost effectiveness

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The company was founded more than 30 years ago

40000 +

The total area exceeds 40,000 square meters

1000 +

Over 1,000 employees

50 %

Around 50% exported to other countries

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NEWS

TSAG Crystal: A Magneto-Optical Material

2025-09-30

Terbium Scandium Aluminum Garnet (Tb₃Sc₂Al₃O₁₂,TSAG) is the key isolator material for next generation fiber laser. As an ideal magneto-optic crystal in visible and infrared regions, TSAG has the advantages of high Verdet constant,excellent thermal and mechanical properties.

CASTECH's "Aspherical" Extraordinary Journey

2025-09-30

CASTECH's aspheric products include both aspheric lenses and aspheric cylindrical lenses, processable from a wide range of optical glass materials covering deep ultraviolet to infrared wavelengths. With high manufacturing precision, these products offer excellent optical performance and high laser-induced damage threshold, making them widely applicable in lasers, precision optics, and optical communications.

To distinguish between “aspheric” and “spheric”, why to make it “perfect”?

2025-09-26

CASTECH can provide high precision aspherical lenses based on CNC precision polishing, including aspherical cylindrical, hyperbolic, axicon andfree-form lenses.

The Evolution of LBO Crystal: From Past to Present

2025-09-26

LBO is an excellent nonlinear optical crystal discovered by FIRSM affiliated to Chinese Academy of Sciences. Its NLO devices now are produced, manufactured and marketed by CASTECH.

CULTURE

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