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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

CLBO - Cesium Lithium Borate

Yb:CALGO - Ytterbium Doped Calcium Gadolinium Aluminate

Optical Assembly

Acousto-Optic Deflectors

Fiber-Coupled Acousto-Optic Modulators

Exhibition Information

LASER World of PHOTONICS CHINA 2026

CASTECH will participate in The LASER World of PHOTONICS CHINA 2026 from March 18th to 20th, 2026.

Photonics West 2026

CASTECH will exhibit at Photonics West 2026 in the United States from January 20 to 22, 2026.

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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

30 +

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

Characteristics and Applications of High-Repetition-Rate Electro-Optic Modulators

2026-02-28

An electro-optic modulator is an optical modulation device based on the electro-optic effect. When a driving voltage is applied to the electro-optic modulator, the orientation of the optical axis within the internal electro-optic crystal rotates, leading to changes in the crystal's refractive index distribution. Due to the different propagation velocities of the ordinary (o) and extraordinary (e) rays inside the crystal, a phase difference arises between them when they reach the same position. This phase difference is dependent on the voltage applied to the crystal.

Continuous Innovation: Manufacturing Optical Components with Higher Laser-Induced Damage Thresholds

2026-02-05

CASTECH employs various LIDT test methods, including R-on-1, S-on-1, 1-on-1, and N-on-1. The appropriate method is selected based on the specific characteristics of the product and customer requirements to monitor the damage threshold of substrate materials, polished components, and coating surfaces.

Guidelines for Surface Quality Control of Optical Components——Standards Analysis, Cleaning Procedures, and Inspection Solutions

2026-01-29

This article systematically outlines internationally mainstream surface quality assessment standards, details key cleaning and inspection technologies, and provides enterprises with standardized, high-precision quality control solutions.

LASER World of PHOTONICS CHINA 2026

2026-03-12

CASTECH will participate in The LASER World of PHOTONICS CHINA 2026 from March 18th to 20th, 2026.

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