Narrow-Band Holographic Filters

NARROW-BAND HOLOGRAPHIC FILTERS

NARROW-BAND HOLOGRAPHIC FILTERS are intended for suppression of powerful beams in research and in engineering, in particular, in laser spectroscopy, and also for protection from blinding and damaging by laser radiation various photo receiver devices and operator's eyes.
Unlike conventional interference filters, which are made by vacuum evaporation techniques, holographic filters are fabricated by recording interference patterns formed between two mutually coherent laser beams. Since all layers are recorded simultaneously within a thick stack, the optical density of the notch filter is high and its spectral bandwidth can be extremely narrow. Also, since the layering profile is sinusoidal instead of square wave, holographic notch filters are free from extraneous reflection bands and provide significantly higher laser damage thresholds.

Parameter	Notch Filter	Notch Filter Plus	Super Notch	Super Notch Plus
Coefficient of suppression of laser radiation	>10 ⁴	>10 ⁶	>10 ⁴	>10 ⁶
Spectral bandwidth of a notch: in wavenumbers between the 50% transmission points, cm ^-1 Bandwidth between 50% transmission points for 514 filter, nm	<500 <13	<500 <13	<350 <10	<350 <10
Spectral width of edges (Stocks) in wavenumbers between O.D. 0.3 and O.D. 4.0 points, cm ^-1	<250	<250	<120	<120
Transmission outside the notch from 460nm to 1500nm, %	>80	>80	>85	>85
Working wavelength range, nm	400¸1200	450¸1200	450¸1200	450¸1200
Standard wavelengths, nm	441.6, 488, 514, 532, 633,690 785, 1064	441.6, 488, 514, 532, 633, 690 785, 1064	441.6, 488, 514, 532, 633, 690 785, 1064	441.6, 488, 514, 532, 633,690 785, 1064
Laser damage threshold, W/cm ²	>10	>10	>10	>10
Maximum size, mm	Æ60	Æ30	Æ30	Æ30
Unit price (for a size of Æ25 mm), US$	900	1100	1500	1900

NOTES:
1. On request, the filters with the anti-reflecting coating on one or both surfaces, with the increased requirements to optical quality, parallelism and flatness of active surfaces can be made.

2. Material of substrates: optical glass, fused silica and other materials, transparent in visible and near infrared region. The smallest thickness of the filter is 2 mm.

3. The price for diameters more than 25 mm increases proportionally to the diameter.

4. The price of filters for “non-standard” wavelengths increases by 25%.
5. Price match guarantee: If you receive better prices than shown on our quote from other vendor, we are ready to match this price and even offer 5% discount!

Del Mar Ventures
4119 Twilight Ridge
San Diego, CA 92130
tel (858) 755-6727
fax (858) 755-6771
v/efax (858) 630-237
v/efax: (509) 752-0123
delmar@sciner.com
http://www.sciner.com/
http://www.femtosecondsystems.com/

Unit price (for a size of Æ25 mm), US$