CASTECH's KTP is featured by:

• Large nonlinear optical coefficient;
• Wide angular bandwidth and small walk-off angle;
• Broad temperature and spectral bandwidth;
• High electro-optic coefficient and low dielectric constant;
• Large figure of merit;
• Nonhydroscopic, chemically and mechanically stable. (read more)

Optical Prisms are used to redirect light at a designated angle. Optical Prisms are ideal for ray deviation, or for adjusting the orientation of an image. An Optical Prism’s design determines how light interacts with it. When light enters an Optical Prism, it either reflects off an individual surface or several surfaces before exiting, or is refracted as it travels through the subs... (read more)

CASTECH presents a cutting-edge high DE reflection grating, tailored for the optical communication industry. This precision-designed grating offers exceptional diffraction efficiency and unparalleled uniformity, making it an ideal choice for applications like Wavelength Selective Switches (WSS) and more. (read more)

Applications

• Laser sensing system
• Ultrafast laser system
• OCT system
• Laser detection etc

Nd:YAG is the earliest and most famous laser host crystal. Since it combines great advantages in many basic properties, Nd:YAG is the ubiquitous presence for near-infrared solid-state lasers and their frequency-doubler, tripler, and higher order multiplier. (read more)

Aspherical lenses from CASTECH revolutionize optical systems with unparalleled precision, whether for prototypes or mass production. (read more)

Elevate WSS and optical communication with CASTECH's precision gratings (read more)

Fiber-Coupled Acousto-Optic Modulators: Cutting-Edge Performance for Diverse Applications; High-Performance Modulation with Unmatched Flexibility (read more)

CASTECH offers:

• Strict quality control;
• Large crystal size up to 10x10x15mm3 ;
• AR-coating, mounts and repolishing services;
• Fast delivery. (read more)

Next-gen nonlinear optical marvel (read more)

Lithium Triborate (LiB3O5 or LBO) is an excellent nonlinear optical crystal discovered and developed by FIRSM, CAS (Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences). CASTECH Inc. has the exclusive rights to produce, manufacture and market the patented LBO crystal and its NLO devices. The patent number is 4,826,283 in USA, 2023845 in Japan and 88,102,0... (read more)

High-Performance Optical Solutions (read more)

Applications: Q-switching, Regenerative amplifier, Pulse picker,read more... (read more)

CASTECH grows Nd:YLF crystals using Czochralski method. The use of high quality starting materials for crystal growth, whole boule interferometry, and precise inspection of scattering particle in crystal using He-Ne laser assures that each crystal will perform well. (read more)

With compact design, small rise-time/fall-time, low insertion loss, high extinction ratio and excellent stability, CASTECH's 200 MHz fiber-coupled AOM is ideal for pulse picking, high-speed modulation applications. (read more)

CPA technique is widely used for generation of ultra-short and high energy pulse of lasers. CASTECH’s reflection grating has been successfully applied on pulse compression. (read more)

Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences), now is manufactured and marketed by CASTECH Inc. The high-quality crystal boule is steadily available from CASTECH, who holds specialized proprietary techniques (flux-method) of the BBO crystal growth.
Application in Nd:YAG Lasers:
BBO is an efficient NLO crystal for the second, third... (read more)

Unrivaled Precision for Engineering Excellence (read more)

Applications:

• Laser sensing system
• Ultrafast laser system
• OCT system
• Laser detection etc

Versatile Precision Optics for Laser Applications (read more)

Experience precision modulation with our efficient 200 MHz fiber-coupled acousto-optic modulator (FCAOM), designed for superior performance. (read more)

CLBO, as one of the few UV nonlinear crystals with cutoff wavelength up to 180 nm, is used for FOHG and FHG of high-power Nd:YAG laser. CASTECH can offer UV AR-coating and sealed housing services. (read more)

Precision Design for Superior Performance (read more)

Highly Resistant to Gray-Tracking, Offering a Reliable Solution for Your High-Power Laser Systems (read more)

Compact, High-Performance 200 MHz Fiber-Coupled AOM for Precision Pulse Picking and Modulation. (read more)

PPLN - Periodically Poled LN: The NLO crystal Lithium Niobate is made into a periodically inverted domain structure, called Periodically Poled Lithium Niobate (PPLN), to compensate for phase mismatch caused by dispersion. (read more)

Hollow-core photonic crystal fibers can guide light through air rather than through glass. CASTECH can provide hollow core photonic crystal fiber optic cables with high-reliability. (read more)

Precision Light Modulation for Varied Applications (read more)

Innovative Grating Technology for Ultra-Short, High-Energy Laser Pulses (read more)

Optimized Solutions for Diverse Applications (read more)

Tailored Solutions for Optimal Broadband Performance (read more)

CASTECH utilizes the high-quality crystals and optical components for the production of Fiber-Free Space Isolators to deliver great performance. The power is ranging from 300 mW to 200 W. The products are featured with high isolation(35 dB for single-stage series and 50 dB for dual-stage series), low insertion loss, excellent environmental stability and free of thermal lens effect. (read more)

Description

CASTECH offers two standard dielectric broadband coatings . Other coatings are available upon request.

• High quality ,excellent value
• Broaband dielectric coatings
• Hight damage threshrod

• Various size of bulk and finished high quality YVO4 crystals up to φ35x50mm3 and φ20x20mm3, respectively;
• Large quantity YVO4 wedges and displacers used for fiber optical isolators and circulators, interleavers, in size of 1.25x1.25x0.5mm3 to 3x3x15mm3 to meet OEM customer’s requirement;
• Quick delivery;
• Very competitive price;<.../li>

• Material from DUV to IR
• Custom dimension and shapes
• Wafer type: Plano or Prism

As an excellent birefringent crystal, YVO4 is widely applied in fiber optic isolators and circulators, interleavers, beam dispalcers and other polarizing optics (refer to Table 1). YVO₄ crystals are widely used in fiber-optic isolators, beam displacers and optical circulators, etc. (read more)

Optimize Your Fiber Laser Systems with High-Performance Isolators (read more)

CASTECH offers CNC precision-polished aspherical and acylindrical lenses, with or without anti-reflection (AR) coatings. Our CNC polished aspheric lenses are iteratively ground and polished by a software supported computer-controlled processing center to provide better controlled surface quality, irregularity and focal length deviation. (read more)

CASTECH offers a large comprehensive selection of optical mirrors for use with light in DUV to IR spectral region, ranging from laser line mirrors, board-band dielectric/metallic mirrors to ultrafast laser mirrors to provide ideal solutions for specialized applications especially at high laser power. (read more)

Elevate systems with CASTECH Fiber-Free Space Isolators. High isolation, low loss, precision control. Ideal for lasers, sensors, gauges. (read more)

Applications:

• Fiber optical sensor system
• Bidirectional signal transmission system
• Dispersion compensation

CASTECH has strong design and testing capabilities to precisely characterize the performance of our optical assemblies. (read more)

CASTECH offers group delay dispersion report by specialized GDD measurement in house. We have a wide range of measure instrument to guarantee high reflectivity, including Cavity-Ring-Down, Varian Cary-5000, Varian Cary-6000, Varian Cary-7000, Perkin Elmer Lambda-950 and Spectrum 100FTIR. Every coating batch is tested to promise high- performance reflectivity values to fit your needs. (read more)

• Material from DUV to FIR
• Custom dimensions and shapes
• Diameter from 0.5 to 600 mm
• Clear aperture: Central 90% of diameter
• Flatness: λ/20@632.8nm ( λ/40 by IBF)
• Surface quality: 10-5 S/D
• Parallelism:＜3″
• Standard and custom AR coating options available
• High laser damage threshold

Beta-Barium Borate (β-BaB2O4 or BBO), discovered and developed by FIRSM, CAS (Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences), now is manufactured and marketed by CASTECH Inc. The high-quality crystal boule is steadily available from CASTECH, who holds specialized proprietary techniques (flux-method) of the BBO crystal growth. (read more)

Polarizing Beamsplitters divide unpolarized beam into two orthogonal, linearly polarized parts. A wide variety of Polarizing Beamsplitters configurations are offered by CASTECH, (read more)

The polarization independent isolator consists of three main components, which are birefringent beam displacer (polarizer), Faraday Rotator, half-wave plate. It’s usually used in the fiber laser system and to maintain the stability of optical system effectively. (read more)

Description

CASTECH offers two standard dielectric broadband coatings . Other coatings are available upon request.

• High quality ,excellent value
• Broaband dielectric coatings
• Hight damage threshrod