• "N-Grade EX," a synthetic quartz crystal of the highest purity with excellent laser resistance, is available.
• Due to its high laser resistance using "N-Grade EX," the highest purity synthetic quartz crystal, it can maintain high transmittance even at the absorption edge in the vacuum ultraviolet region.
• It has high transmittance in the terahertz band and can be used for medical and security applications.
• Large sizes up to Φ200 mm (Laser grade) are available.

Class of Quartz Crystal for Quartz Crystal Wave Plates for High Power Lasers

"N-Grade EX" is the highest purity component.

Grade	Inclusion Density1) (JIS Standard)	Q3585Value2) (JIS Standard)	Impurities (ppb) Reference Value3)					Operating Temperature4)
			Al	Na	Ca	Fe	Li
	Ⅰa	Aa	19	<2	<1	<1	5	573 max
	Ⅰa	A	70	60	<40	<40	<40	573 max
Laser	Ⅰa	C	2700	1100	140	40	800	573 max

Remarks)

1. 1）The foreign matter density complies with JIS-C 6704. Ia grade is the product with the fewest optical inclusions.
2. 2）The infrared absorption coefficient a value complies with JIS-C 6704. Standardized by the absorption coefficient of hydroxyl group-OH.
3. 3）This is an example of quantitative analysis by ICP-MS. We do not guarantee the amount of impurities. It is possible to analyze and attach each gemstone upon request, but in that case an analysis fee will be charged separately.
4. 4）Artificial quartz has a phase transition temperature of 573℃. Please use below this temperature.

N-Grade EX

Reuglar Optical Grade (JIS Grade D)

Laser Irradiation Conditions : ArF Excimer Laser　50mJ/cm2,100Hz,1×10⁵ shot
Device : VARIAN　Measurement Wavelength：190〜800nm

We also offer coatings that are highly resistant to lasers, with design and manufacturing methods that take laser damage into account.

Example of AR Coating for Laser Wave Plate (248nm)
[ Laser Damaged Threshold Value: 40J/cm² ]

Irradiation Beam Profile
X230μm X y725μm

Evaluation Optics System

Example of AR Coating for Laser Wave Plate (532nm)
[ Laser Damaged Threshold Value: 140J/cm² ]

Irradiation Beam Profile
X280μm X y230μm

Evaluation Optics System

Example of AR Coating for Laser Wave Plate (1064nm)
[ Laser Damaged Threshold Value: 256J/cm² ]

Irradiation Beam Profile
X480μm X Y510μm

Evaluation Optics System

Wave Profile of Laser Pulse (10ns)

To prevent deterioration of the adhesive by lasers, optical contact type wave plates without adhesive are also available for adhesive type wave plates.
The number of coatings can be reduced, and laser resistance can be improved compared to the conventional air gap type.

※Laser damage threshold measurement：Laser Institute for Technology.
(These are evaluation test results and are not guaranteed values.)

Purchase Information

The products listed in our Product Lineup are also available on Meetoptics, an online marketplace for optical products.
→Our products on MEETOPTICS
https://www.meetoptics.com/optics/all?Supplier__t_s=NDK

Test items include temperature, humidity, impact resistance, heat resistance, etc. for the environmental and mechanical properties of optical components.
We set test items and conditions for each component and guarantee the properties of the component. However, warranty items and conditions vary depending on the shape, properties, application, and environment of the optical component.