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02-28

2026

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

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.

2026-02-28

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

02-05

2026

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

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.

2026-02-05

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

01-29

2026

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

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.

2026-01-29

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

01-16

2026

Numerical Simulation: Revealing the Secrets of "Temperature and Flow" in Crystal Growth

2026-01-16

12-04

2025

Laser Beam Expander: Parameter, Principle, and Product Selection

Laser beam expanders are designed to alter the laser beam diameter, divergence angle, and intensity distribution. They are commonly used in applications such as laser scanning, laser resonators, laser interferometry, and remote sensing to achieve functions like reducing spot energy density, decreasing beam diameter at a specific distance, minimizing focused spot size, and compensating for laser beam size. They are one of the most widely used components in laser systems.

2025-12-04

Laser Beam Expander: Parameter, Principle, and Product Selection

12-02

2025

Nd:YVO4 Crystal: An Excellent Laser Gain Medium

CASTECH's Nd:YVO4 crystals are renowned for their precise doping concentration control, exceptional optical quality, and advanced coating technologies. These products serve leading solid-state laser manufacturers and research institutions worldwide. The company not only meets the bulk demands of the global laser industry but also drives continuous innovation in laser technology through its customizable solutions.

2025-12-02

Nd:YVO4 Crystal: An Excellent Laser Gain Medium

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