Crystal Optics

Most optical materials are amorphous such as optical glass; however, there are a wide variety of crystals with some unique properties that are useful for optical and semiconductor applications. Some of them have a very good transmission from the ultraviolet to near IR regions. Their optical applications range from solid state laser generation, polarized beam generation, beam walk-off, phase modulation to new wavelength generation.

Optical crystals vary in material properties but all have a common foundation: they are grown from high-purity raw materials. These types of optical materials have excellent performance with lasers, semiconductor, medical, and military applications.

Sapphire, for instance, is highly durable and is commonly used in military application from the visible to the mid-wave infrared whereas BBO is very good for tunable laser sources, such as ultrafast Ti:Sapphire or dye lasers. These materials are manufactured using an assortment of methods that are specific to Photonchina.


In Photonchina, we can manufacture wafers, lenses, prisms, and windows with crystal materials. We provide a wide variety of coatings from single layer antireflective coatings using MgF2 to complex multilayer dielectric stacks.

We own different kinds of coaters to supply different coatings from Antireflection Coating(AR), Partial Reflection Coating(PR),Beamsplitter Coating, High Reflection Coating(HR), to Metal or Metallic Coating. We can provide coatings with high surface quality, high damage threshold coatings, and more.

Photonchina offers the following crystals and polarizers.

Crystal Polarizers

Glan-Taylor, Glan-laser, Glan-Thompson, High transmission, Wollaston, Rochon Polarizers


Zero order waveplate, multi order waveplate, dual wavelength waveplate: octadic  (1/8), quarter (1/4), half (1/2) and full waveplate


The yttrium orthovanadate (YVO4) is a positive uniaxial crystal. It is ideal for optical polarizing components because of its wide transparency range and large birefringence. 


Calcium Fluoride crystal has good performance at 0.13~10 μm wavelength range and is transparent over a broad range from ultraviolet (UV) to infrared (IR) frequencies.


BBO is one of the few practical crystal for use below 500 nm in SHG and SFM.


LBO is often used for second harmonic generation (SHG, also known as frequency doubling), for example of Nd:YAG lasers (1064 nm → 532 nm).


LiNbO3 is widely used as electro-optic modulators and Q-switches for Nd:YAG, Nd:YLF and Ti:Sapphire lasers as well as modulators for fiber optics. 


Terbium Gallium Garnet(TGG),as a magneto-optical crystal, is an optimum material for Faraday devices (Rotator and Isolator) in the range from 400nm-1100nm, excluding 470-500nm.


Sapphires are often used in infrared optical components, high-durability windows and very thin electronic wafers.


Windows, lenses ,and prisms made of MgF2 can be used over the entire range of wavelengths from 0.12μm(vacuum ultraviolet ) to 8.0μm (infrared).