Holographic Notch Filters

“Your holographic notch filters are excellent! We put them into our Raman system and now have a huge improvement in the cutoff edge for the Raman shift. We will recommend your filters to all of our colleagues.”
-Purdue University

Notch filters are intended for suppression of powerful laser beams in research experiments such as Raman Laser Spectroscopy and other applications. They can also be used for eye protection and prevention of other damage caused by laser radiation.

We use a proprietary di-chromated gelatin process that ensures greater suppression, better edgewidths and longer environmental stability. We also guarantee a standard angle of incidence tolerance of less than 1 degree, unlike other suppliers. Custom designs are always welcome, from different design wavelengths to odd angles of incidence. See our pricing below for the best value in the industry.

Current Inventory (updated weekly):

Unless otherwise noted, all diameters are 25 mm.

CUSTOM HARD COATED NOTCH FILTERS:

1310nm 1″ diameter – Contact us for performance specs and pricing – one available for immediate delivery

1550nm 1″ diameter – Contact us for performance specs and pricing – one available for immediate delivery

Narrow Band Filter:
NBF-975.0-25 – 3 pcs.

Notch Filter Upgrades:
NFU-633.0-25  SPECIAL - $750 – one available for immediate delivery
NFU-785.0-25  SPECIAL – $750 – one available for immediate delivery

Ultra Notch Filter:
UNF-441.6-25  SPECIAL – $875 – one available for immediate delivery
UNF-514.5-25  SPECIAL – $875 – one available for immediate delivery

Ultra Notch Upgrade:
UNUF-514.5-25  SPECIAL – $990 – one available for immediate delivery

 

The name of parameter

Narrow-band filter

Notch Filter

Notch Filter Upgrade

Ultra Notch

Ultra Notch Upgrade

Coefficient of suppression of laser radiation

> 10 4

> 10 4

> 10 6

> 10 4

> 10 6

Spectral Bandwidth of a notch:in wavenumbers between 50% transmission points (cm –1)Bandwidth between 50% transmission points for 514 filter (nm)

< 700

< 20

< 500

< 13

< 500

< 13

< 350

< 10

< 350

< 10

Spectral Edgewidth inwavenumbers between O.D. 0.3 and O.D. 4.0 (cm –1)

< 300

< 250

< 250

< 120

< 120

Transmission outside the notch
from460nm to 1500nm (%)

> 70

> 80

> 80

> 85

> 85

Working wavelength range (nm)

400-1200

400-1200

450-1200

450-1200

450-1200

Standard wavelengths (nm)

441.6, 488, 514.5, 532, 633, 690 785, 1064

441.6, 488, 514.5, 532, 633,690 785, 1064

441.6, 488, 514.5, 532, 633, 690 785, 1064

441.6, 488, 514.5, 532, 633, 690 785, 1064

441.6, 488, 514.5, 532, 633,690 785, 1064

Laser damage threshold (W/cm2)

> 10

> 10

> 10

> 10

> 10

Maximum size (mm)

Æ 70

Æ 60

Æ 30

Æ 30

Æ 30

Price, Æ
25 mm or less, qty=1
emailor call

email

or call

email

or call

email

or call

email

or call

 

NOTES:

 

1. Custom wavelengths, coatings and operating angles available upon request.

2. Substrate material: Fused Silica Minimum thickness ~ 2 mm.

3. For diameters > Ø 25 mm price increases proportionally to the diameter increase.