What CASTECH does

CASTECH (legal name: Fujian Castech Crystals, Inc.) is a Chinese specialty manufacturer of advanced optical crystals, founded in 1988 as a spin-off from the Fujian Institute of Research on the Structure of Matter (FIRSM), Chinese Academy of Sciences. The company develops, grows, fabricates, and coats nonlinear optical (NLO) crystals (BBO, LBO, KTP, BiB3O6), laser host crystals (Nd:YAG, Nd:YVO4, Nd:GdVO4, Cr4+:YAG), electro-optic crystals (LiNbO3, LiTaO3, MgO:LiNbO3, KD*P), photorefractive crystals (BGO, Ce:BaTiO3), X-ray diffraction crystals, and supporting optical materials (sapphire, undoped YAG, quartz). CASTECH holds exclusive patent rights to the LBO crystal in the US, Japan, and China, and applies proprietary growth techniques including the Czochralski method, flux-method BBO growth, and top-seeded solution growth (TSSG) for BiB3O6.

The company's commercial customer base spans laser system manufacturers, fiber optics component makers, scientific research institutions, and medical/scientific instrumentation users, with documented end-use cases including diode-pumped solid-state lasers, frequency conversion (SHG/THG), optical parametric oscillators, fiber optic isolators, Q-switches, scintillation detectors, and X-ray crystallography. Production scale exceeds 10,000 Nd:YVO4 devices per month for a single product line, with broader capacity across the full portfolio. CASTECH also operates an aspherical lens manufacturing line using ion beam figuring (IBF) and offers custom fabrication services including AR-coatings, mounting, and re-polishing.

CASTECH's revenue model is B2B direct sales of finished crystals on a one-time purchase basis, with quote-based pricing for custom specifications and supplementary revenue from custom coatings. The company distributes globally through direct sales from its Fujian, China headquarters and through CONEX Systems Technology, Inc., its authorized US channel partner based in San Jose, California. Fast delivery (10 days polished-only, 15 days AR-coated), strict quality control, and technical design support are core elements of the value proposition. No revenue figures, headcount, or funding data are publicly disclosed, and CASTECH is privately held with origins in a Chinese government/state-affiliated research institution.

Name

CASTECH

Legal name

Fujian Castech Crystals, Inc.

Website

https://castech-us.com

Company type

Private

Founded year

1988

Operating status

Operating

Short description

CASTECH (Fujian Castech Crystals, Inc.) manufactures nonlinear, electro-optic, laser, and photorefractive crystals for laser manufacturers, fiber optics companies, and research labs. Founded in 1988 as a spin-off from the Chinese Academy of Sciences, it holds exclusive patent rights to LBO crystal and distributes globally via CONEX Systems Technology.

Ownership category

akta.pro rank

Product category

Optical Crystals and Photonics Components

NAICS

Glass and Glass Product Manufacturing (3272)

SIC

Optical Instruments & Lenses (3827)

akta.pro primary industry

Optoelectronics & Photonics (LED/Laser/Optical ICs) (HDAHAAAH)

akta.pro secondary industry

Optoelectronic Emitters (LED/Laser/VCSEL) (HDAHALAL)

Keywords

• Nonlinear optical crystals
• Laser crystals
• Electro-optic crystals
• Optical components manufacturing
• Frequency conversion crystals

Headquarters

HQ city

Fujian

HQ country

China

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Technology or R&D, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Optical Crystal Products: CASTECH generates revenue through the sale of optical crystal products including NLO crystals (LBO, BBO, KTP), laser crystals (Nd:YAG, Nd:YVO4), electro-optic crystals (LiNbO3, LiTaO3), and optical materials. Products are sold as finished crystals with various specifications, coatings, and mounting options. One-time purchase model with standard and custom specifications.
2. Custom Crystal Fabrication Services: CASTECH provides custom fabrication services including AR-coating, mounts, re-polishing, and design services. Engineers assist customers in selecting and designing optimal crystals based on their laser parameters. Additional services include sealed housing for moisture-sensitive crystals like KDP family.
3. Coatings and Surface Treatment: Coatings services including Dual Band AR-coating (DBAR), Broad Band AR-coating (BBAR), High Reflectivity coatings, and P-coatings for OPO applications. These are applied to crystals for enhanced performance and damage thresholds.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

CASTECH develops, grows, fabricates, and coats advanced nonlinear optical (NLO), electro-optic, laser, photorefractive, acousto-optic, and birefringent single crystals — including BBO, LBO (under exclusive patent from FIRSM, CAS), KTP, Nd:YAG, Nd:YVO4, Nd:GdVO4, LiNbO3, LiTaO3, MgO:LiNbO3, KDP/KD*P, Cr4+:YAG, and BiB3O6 — for sale as finished products with custom specifications, coatings, and mounting to laser manufacturers, fiber optics companies, and scientific/medical instrument makers.

Product overview

CASTECH (Fujian Castech Crystals, Inc.) is a leading manufacturer of advanced optical crystals and photonics solutions, founded in 1988 by the Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences. The company specializes in nonlinear optical (NLO), electro-optic, laser, photorefractive, acousto-optic, and birefringent crystals. The product portfolio includes core crystal products such as BBO, LBO (for which CASTECH holds exclusive patent rights), KTP, YVO4, Nd:YVO4, Nd:YAG, Nd:GdVO4, LiNbO3, LiTaO3, MgO:LiNbO3, KDP/KD*P, Cr4+:YAG, BiB3O6, and various photorefractive crystals like Ce:BaTiO3 and BGO. These crystals are complemented by a full range of optics products including antireflective coatings, windows, prisms, lenses, polarizing optics, and beamsplitters. CASTECH also produces optical materials such as Sapphire and undoped YAG crystals, and X-ray crystals including PET, TAM, RAP, KAP, OHM, and TlAP. The company serves scientific, industrial, and medical applications in lasers, precision optics, fiber optics, and electro-optic devices.

Differentiator

Problem solved

Functional benefit

Products and services

• LBO (Lithium Triborate) Crystals Nonlinear optical crystal with broad transparency range from 160nm to 2600nm, high optical homogeneity, large effective SHG coefficient, and high damage threshold, used for frequency doubling, tripling, and OPO/OPA applications in laser systems. CASTECH holds exclusive worldwide patent rights.
• BBO (Beta-Barium Borate) Crystals Nonlinear optical crystal with broad phase-matchable range from 409.6nm to 3500nm and large effective SHG coefficient about 6 times greater than KDP, used in high-power Nd:YAG laser frequency conversion and UV generation.
• KTP (Potassium Titanyl Phosphate) Crystals Widely used nonlinear optical crystal for commercial and military lasers including laboratory and medical systems, range-finders, lidar, optical communication and industrial systems for frequency doubling. Delivers >80% conversion efficiency for Nd:YAG green output.
• Nd:YVO4 (Neodymium Doped Yttrium Orthovanadate) Crystals
• Nd:YAG (Neodymium Doped YAG) Crystals

Quantifiable outcome

• SHG conversion efficiency >70% for pulse and 30% for cw Nd:YAG lasers using LBO
• +4 more outcomes

Named customers2 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• CONEX Systems Technology, Inc.coreChannel Partner/ Reseller/ DistributorCONEX Systems Technology, Inc. serves as the authorized US distributor for CASTECH products. Located at 2880 Zanker Road, Suite 203, San Jose, CA 95134. Handles US sales, customer support, and logistics for CASTECH optical crystals and components.

Scale indicators4 records

Recent moves5 records

Expansion highlights4 records

Market position

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/conex-systems-technology-inc.

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about CASTECH