Announcements

CASTECH, Inc. has promoted these products / services:

CASTECH, Inc. - Free Space Isolators

Free space isolators are divided into two categories as polarization dependent isolator and polarization independent isolator.

The polarization dependent isolator, or Faraday isolator consists of three major parts which are input polarizer (polarized vertically), Faraday Rotator, and output polarizer (aligned at 45°relative to the input polarizer). (read more)

CASTECH, Inc. - Aspherical Lenses
  • Material from DUV to IR
  • Custom dimension and shapes
  • Diameter from 5 to 200 mm
  • Clear aperture: Central 90% of diameter
  • Irregularity : λ/10@632.8nm
  • Surface quality: 20-10 S/D
  • Centration: <3′
  • Standard and custom coating options available
  • High laser damage threshold
(read more)
CASTECH, Inc. - CLBO Crystal for YAG laser

Cesium Lithium Borate (CsLiB6O10,CLBO) is a newly developed crystal with excellent UV nonlinear feature,and widely used for semiconductor inspection,micro processing,bio-medical,UV-LIDAR,etc. Compared to BBO,it has larger spectral and temperature acceptance,larger angle tolerance and smaller walk-off angle (see Table 1). (read more)

CASTECH, Inc. - Acousto-Optic Modulators

Acousto-optic modulators (AOM) can be used like a shutter (cycling light on and off at a set frequency), or as a variable attenuator (controlling the intensity of transmitted light dynamically). This product only presents 1st order diffracted light under the interaction of Bragg diffraction. (read more)

CASTECH, Inc. - BIBO optical crystal

BiB3O6 (BIBO) is a newly developed nonlinear optical crystal. It possesses large effective nonlinear coefficient, high damage threshold and inertness with respect to moisture. Its nonlinear coefficient is 3.5 - 4 times higher than that of LBO, 1.5 -2 times higher than that of BBO. (read more)

CASTECH, Inc. - Cylindrical Lenses
  • Material from DUV to IR
  • Custom dimension and shapes
  • Diameter from 5 to 300 mm
  • Clear aperture: Central 90% of diameter
  • Irregularity : λ/10@632.8nm
  • Surface quality: 10-5 S/D
  • Centration: <1′
  • Standard and custom coating options available
  • High laser damage threshold
(read more)
CASTECH, Inc. - Optical Prisms
  • Material from DUV to IR
  • Custom dimensions and shapes
  • A wide range of optical prism types
  • Diameter from 0.5 to 100 mm
  • Clear aperture: Central 90% of diameter
  • Flatness: λ/10@632.8nm
  • Surface quality: 10-5 S/D
  • Angular tolerance :<15″
  • Standard and custom coating options available
  • ...
(read more)
CASTECH, Inc. - Acoust-Optical Laser RF Driver

RF driver can output the signals at fixed or variable-frequencies. Specified waveforms could be produced by different modulated signals to meet the requirements of acousto-optic components in different applications. (read more)

CASTECH, Inc. - Laser Crystal

Yb:CaGdAlO4(called CALGO) is a promising new laser gain material which possess several important advantages. The crystal structure of CALGO is tetragonal. When it is pumped at 979nm under pi configuration, we can get broad emission spectra from 994nm to 1050nm in theta configuration. This implies a very small quantum defect (down to 1.5%) a (read more)

CASTECH, Inc. - Gratings

High Efficiency Reflection Grating, 1200 line/mm for 1520nm-1570nm

Features:

  • Popular applications in Telecom @1550nm, especially for WSS;
  • Very high diffraction efficiency;
  • Excellent feature fidelity and groove uniformity;
  • Extreme environmental stability;
  • Low light scatter;
  • Very competitive pricing;<.../li>
(read more)
CASTECH, Inc. - Adjustable Laser Beam Expanders

Applications:

  • Laser scanning
  • Short pulse laser
  • Ultra-short pulse laser
(read more)
CASTECH, Inc. - Faraday Rotators with 100W of Power Handling

Applications:

  • Laser sensing system
  • Ultrafast laser system
  • OCT system
  • Laser detection etc
(read more)
CASTECH, Inc. - Optical Mirrors
  • Substrate material from DUV to IR
  • Custom dimensions and shapes
  • Diameter from 5 to 300 mm
  • Clear aperture: Central 90% of diameter
  • Flatness: λ/10@632.8nm
  • Surface quality: 10-5 S/D
  • Parallelism:<3′
  • Partial and high reflectivity optical mirrors are available upon custom request
  • High laser....
(read more)
CASTECH, Inc. - Optical Windows
  • 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
(read more)
CASTECH, Inc. - Broadband Low GDD Ultrafast Mirrors

Features:

  • Material: Fused Silica or N-BK7
  • Custom reflectivity and GDD
  • Dielectric broadband coatings
  • High damage threshold
(read more)
CASTECH, Inc. - High Reflectivity Mirrors
  • Material from DUV to IR
  • HR-266nm,HR-355nm,HR-532nm,HR-1064nm, HR-1550nm
  • and custom wavelengths
  • Best R>99.995% @laser wavelength
  • Surface quality: 20-10 S/D
  • Custom dimension and shapes
(read more)
CASTECH, Inc. - High Flatness Optics

Ion Beam Figuring(IBF)

The ion beam figuring (IBF) process is realized as the most precise technology of optical surface figure correction. A Gaussion formed beam of accelerated ions operating in a vacuum environment bombards into the surface of workpiece to remove the material by physical sputtering at the atomic level. Following the time dwell strategy employed, (read more)

CASTECH, Inc. - Super Polished Optics
  • Surface roughness down to 1Å (substrate made from Fused Silica)
  • Ultra-low surface scatter
  • Flatness: λ/10
  • Surface quality: 10-5 S/D
  • High laser damage threshold
(read more)
CASTECH, Inc. - High Laser Damage Threshold Optics

With decades of knowledge and experience in laser industry, CASTECH masters both super polishing and IBS coating techniques which could exhibit extremely low optical losses and high laser induced damage threshold. The weak absorption of coatings and substrates down to 1ppm could be detected by our photothermal common-path interferometer. Combined with the selected right materials, (read more)

CASTECH, Inc. - Optical Assembly
  • Component types: Glass-Glass and Glass-Metal
  • Bonding methods: Epoxy bonding, Optical Contact, Optical diffusion bonding
  • Diameter ranged from 1 to 400 mm
  • Transmitted wavefront Distortion : up to λ/20 @632.8nm
  • Transmitted & reflected beam deviation : ± 1 ″ to ±5 ″
  • Customized design available<.../li>
(read more)
CASTECH, Inc. - MgO:LiNbO3

Compared with LiNbO3 crystal, MgO:LiNbO3 crystal exhibits its particular advantages for NCPM frequency doubling (SHG) of Nd:Lasers, mixing (SFG) and optical parametric oscillators (OPOs). The SHG efficiencies of over 65% for pulsed Nd:YAG lasers and 45% for cw Nd:YAG lasers have been achieved by MgO:LiNbO3 crystals, (read more)

CASTECH, Inc. - KTA Crystal

Potassium Titanyle Arsenate (KTiOAsO4), or KTA crystal, is an excellent nonlinear optical crystal for Optical Parametric Oscillation (OPO) application. It has better non-linear optical and electro-optical coefficients, significantly reduced absorption in the 2.0-5.0 µm region, broad angular and temperature bandwidth, low dielectric constants. And its low ionic conductivities result... (read more)

CASTECH, Inc. - Gratings-from Prototype to Mass Production

CASTECH’high DE reflection grating is ideal for telecommunication industry. Generated by state-of-art holographic, iron etching and replication technology, we proudly promise high diffraction efficiency, perfect uniformity and competitive price. (read more)

CASTECH, Inc. - KD*P Cells

CSATECH offer different kinds of KD*P Pockels Cells. The DPC-R series are cylindrical and the DPC-S series are cubic. For DPC-R series, the electrode connection can be optional among wires , thread and pin. And also, it's available with integrated, pre-adjusted Brewster polarizer such as DPC-R8S-PB and with ceramic to control the aperture such as DPC-R8S-PC. (read more)

CASTECH, Inc. - Scintillation Crystals

Cadium tungstate (CdWO4, CWO) single crystal is an important scintillation materials applied in the radiation detection technology, especially for security checking , industrial CT and medical imaging. (read more)

CASTECH, Inc. - Gires-Tournois Mirrors

The group delay dispersion (GDD) measurement system characterizes the GDD properties of reflective and transmissive optics that are used with femtosecond pulsed lasers. Ultrafast pulses broaden as they propagate through an optical system, short pulse widths can be recovered by knowing the GDD induced by each optics and compensating for the distortions appropriately. (read more)

CASTECH, Inc. - Cr:LiSAF(optical crystal)

CASTECH provides high quality, Cr-doped Colquiriite crystal (Cr:LiSAF) using the Czochralski technique. It is excellent laser material with high energy storage and high slope efficiency. It is also ideal working material under conditions of ultra short pulse and ultra high power. Currently, Cr:LiSAF related products such as flashlight pumping and diode pumping laser have been widely used. (read more)

CASTECH, Inc. - Birefringent Crystals

The Yttrium Orthovanadate (YVO4) is a positive uniaxial crystal grown with Czochralski method. (read more)

CASTECH, Inc. - Optical Coating - Laser Line Dielectric Coatings

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

  • High quality ,excellent value
  • Broaband dielectric coatings
  • Hight damage threshrod
(read more)
CASTECH, Inc. - Er,Cr:YSGG

Er,Cr:YSGG (Erbium,Chromium doped Yttrium Scandium Gallium Garnet) provides an efficient laser crystal for generating 2800nm light in an important water absorption band. It becomes one of the most promising laser crystals recently owing to its high conversion efficiency,stable chemical properties,long fluorescent lifetime. (read more)

CASTECH, Inc. - Nd:YLF

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)

CASTECH, Inc. - Nd:YAG

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)

CASTECH, Inc. - RTP Crystal

RTP (Rubidium Titanyle Phosphate – RbTiOPO4) is an isomorph of KTP crystal which is used in nonlinear and Electro-Optical applications. It has advantages of high damage threshold (about 1.8 times of KTP), high resistivity, high repetition rate, no hygroscopic and no induced piezo-electric effect with electrical signals up to 60 kHz. Its transmission range is 350nm to 4500nm. (read more)

CASTECH, Inc. - Acousto-Optic Frequency Shifters

The acousto-optic Frequency Shifter (AOFS) with RF driver is used to modify the frequency of the optical beam. Due to the Doppler shift, the frequency shift of 1st order diffracted light (variation quantity of wavelength) equals to the frequency of acoustic (wavelength) after the AO frequency shifters. If the incident direction of acoustic wave and optical wave are the same, (read more)

CASTECH, Inc. - Optical Circulator

Castech's high power Optical Circulator could routes incoming signals from Port1 to Port2, incoming port2 signals to port3. This component has excellent performance of low insertion loss, low PDL and high stability. (read more)

CASTECH, Inc. - LBO Crystal

Lithium Triborate (LiB3O5 or LBO) is an excellent nonlinear optical crystal discovered and developed by FIRSM, 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 88,102,084.2 in China. (read more)

CASTECH, Inc. - BBO laser Crystal

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)

CASTECH, Inc. - Laser Crystals - KTP Crystal

Potassium Titanyl Phosphate (KTiOPO4 or KTP) is widely used in both commercial and military lasers including laboratory and medical systems, range-finders, lidar, optical communication and industrial systems. (read more)

CASTECH, Inc. - KTP Crystal

Potassium Titanyl Phosphate (KTiOPO4 or KTP) is widely used in both commercial and military lasers including laboratory and medical systems, range-finders, lidar, optical communication and industrial systems. (read more)

CASTECH, Inc. - KD*P & KDP

Potassium Dihydrogen Phosphate (KDP) and Potassium Dideuterium Phosphate (KD*P ) are among the most widely-used commercial NLO materials, characterized by good UV transmission, high damage threshold, and high birefringence, though their NLO coefficients are relatively low. They are usually used for doubling, tripling and quadrupling of a Nd:YAG laser under the room temperature. (read more)

CASTECH, Inc. - Birefringent Crystals-YVO4

The Yttrium Orthovanadate (YVO4) is a positive uniaxial crystal grown with Czochralski method. (read more)

CASTECH, Inc. - Optical Crystals-YVO4

The Yttrium Orthovanadate (YVO4) is a positive uniaxial crystal grown with Czochralski method. It has good temperature stability and physical and mechanical properties. It is ideal for optical polarizing components because of its wide transparency range and large birefringence. It is an excellent synthetic substitute for Calcite (CaCO3) and Rutile (TiO2) crystals in many applications...... (read more)

CASTECH, Inc. - TSAG Crystal-optical Crystal

TSAG is a 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. (read more)

CASTECH, Inc. - Laser Crystals-Yb:CaGdAlO4

Yb:CaGdAlO4(called CALGO) is a promising new laser gain material which possess several important advantages. The crystal structure of CALGO is tetragonal. When it is pumped at 979nm under pi configuration, we can get broad emission spectra from 994nm to 1050nm in theta configuration. This implies a very small quantum defect (down to 1.5%) and gives a good expectation of obtaining ultra-s... (read more)

CASTECH, Inc. - Nd:YVO4

Nd:YVO4 is the most efficient laser host crystal for diode pumping among the current commercial laser crystals, especially, for low to middle power density. This is mainly for its absorption and emission features surpassing Nd:YAG. (read more)

CASTECH, Inc. - In-line isolator

CASTECH's high power in-line isolators have center wavelength of 980/1030/1064nm, could maintain frequency stability in fiber lasers, fiber amplifier, optical sensor. High power in-line Isolators handling power are up to 100W. (read more)

CASTECH, Inc. - High quality Broadband Dielectric Coatings

Description

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

  • High quality ,excellent value
  • Broaband dielectric coatings
  • Hight damage threshrod
(read more)
News articles and press releases for CASTECH, Inc.:

10/08/2020

CASTECH will participate in OPTICS VALLEY OF CHINA INTERNATIONAL OPTOELECTRONIC EXPOSITION AND FORUM in China Optics Valley Convention & Exhibition Center, Wuhan, Hubei from November 11th to 13th Visit, booth number: 3A01.

10/08/2020
Optatec 2020 10/08/2020

CASTECH,Inc. will participate in Optatec 2020 Online. Click to visit CASTECH's Optatec VIRTUAL Showroom.

09/30/2020

The 18th Fujian Outstanding Entrepreneurs Commendation Conference was held in Fujian Huitang on September 29, 2020. Chen Qiuhua, general manager of CASTECH, was awarded the Fujian Provincial Outstanding Entrepreneur Medal.

09/15/2020

In OFweek Laser Awards 2020, CASTECH’s TSAG magneto-optical crystal and photoelastic modulator won the award Innovation Award of Laser Components in Laser Industry and Accessories and Component Technology in Laser Industry

09/07/2020

CASTECH successfully developed high-power magneto-optical isolator products. Optical isolators are devices that only allow one-way light to pass through. CASTECH is specialize in crystal growth and component manufacturing.

06/24/2020

Visit CASTECH at LASER World of PHOTONICS CHINA Booth 7.1 B509 for innovative, one-stop ultra fast and high power laser solutions.

01/22/2020

Discover your best one-stop ultra-fast laser solution: laser crystals, laser optics, and laser components at Photonics West 2020 (South Hall #667).

11/27/2019

New arrivals: LiDAR, AR/VR optics, gratings, megawatt-class high power laser optics, 500 W high power isolators, and CWO crystals.

08/28/2019

CASTECH brings new products — LiDAR, AR/VR optics, gratings, megawatt-class high-power laser optics, 500W high-power isolators, more — to CIOE 2019, September 4-7 (Booth 9D09).