Various Liquid Light Guides

Liquid Light Guides

Excellent throughput – large core diameters, no packing losses, high N.A.
DUV models provide alternative to fibers for wavelengths down to 220 nm
Single branch and bifurcated models

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Overview
Specifications
Ordering
Drawings
Literature & Downloads

If you need high light throughput anywhere in the UV to NIR, our Liquid Light Guides are the smart choice. They are more efficient and less expensive than Fused Silica Fiber Bundles, and you don’t have to worry about fiber breakage! We’ve expanded our line to include DUV light guides, which transmit down to 220 nm and bifurcated models for selected wavelength ranges.

Fig. 1 Typical transmittance of selected Liquid Light Guides

Fig. 2 Typical transmittance of DUV Liquid Light Guides compared to conventional quartz

Bifurcated Models

For dual source applications, we offer bifurcated liquid light guides. The single end does not meet into a common circular core; the two cores are stacked in the common end (see Fig. 3). Each leg has an active core of 3 mm and a length of 39 or 79 inches (1 or 2 m). We can also supply trifurcated liquid light guides; contact us for details.

Fig. 3 Front view of common end of a bifurcated liquid light guide. The end does not merge into a single circular core.

Large Acceptance Angles

The acceptance angle of our liquid light guides is significantly higher than for our Single Branch Fiber Bundles. This means you get significantly more throughput from the same core diameter. The geometrical extent (a measure of fiber optic light gathering capability) of a 3 mm diameter UV-VIS liquid light guide is 8.5 mm²; that of a 3.2 mm diameter fused silica fiber bundle is 1.1, and that of a 3.2 mm diameter glass bundle is 7.6.

Rugged Construction

These light guides are robust and long-lived in normal use. They consist of a plastic tube covered by a protective aluminum spiral and covered by a PVC jacket. The inner tube is filled with a proprietary, transparent, anaerobic, non-toxic fluid. The tube is sealed at both ends with polished fused silica or glass windows and protected by an interlocking stainless steel sheathing.

Like all our fiber optics, these have 11 mm ferrules on the ends so they fit in our Rod Mount for Fiber Bundles. To ensure long life, the temperature at the input face should not exceed 40 °C. Also, the UV-VIS models should not be exposed to wavelengths shorter than 300 nm, the VIS models to 340 nm, and the VIS-NIR to 420 nm.

UV Models

We offer these liquid light guides as yet another alternative for delivery of the DUV output from our deuterium and arc lamps. Choose a liquid light guide when you need maximum throughput and the large core diameter of these guides is not a concern. For small point sources, 1 mm or less, we offer Solarization Resistant Fibers. We compare the transmittance of a 5 mm diameter liquid light guide to a typical quartz fiber bundle, in Fig. 2. DUV liquid light guides have a limited lifetime. Formation of bubbles in the liquid leads to a significant drop in throughput. Storage in a cold and humid environment extends the lifetime. The long term operational temperature range of these guides is 5 to 30 °C. Table 1 shows the average useful life of the DUV light guides.

Table 1 Average Useful Life of DUV Liquid Light Guides

Core Diameter - mm	Average Useful Life
3	3 Years
5	3 years
8*	1 year

Specifications

	76840	77554	77566	77634
Transmittance Range	220 to 600 nm	300 to 650 nm	340 to 800 nm	420 to 2000 nm
Numerical Aperture	0.43	0.59	0.59	0.52
F/#	1.2	0.85	0.85	0.96
Acceptance Cone, 2a	50°	72°	72°	62°
Core Diameter in. (mm)	0.12 (3)
Length in.	39.4

Specification table information for 0.12 inch core, 1.6 inch bend radius, 39.4 inch length light guides.

Model	Description	avail raw	Availability	price raw	Price	Qty. MULTI ADD
76843	Liquid Light Guide, 220-600nm, 0.2in Core, 2.4in Bend Radius, 79in Length	0	In Stock	1486	$1,486.00	ADD
77556	Liquid Light Guide, 300-650nm, 0.2in Core, 2.4in Bend Radius, 39.4in Length	0	In Stock	318	$318.00	ADD
77632	Liquid Light Guide, 340-800nm, 0.3in Core, 3.9in Bend Radius, 79in Length	0	In Stock	996	$996.00	ADD
77638	Liquid Light Guide, 420-2000nm, 0.3in Core, 3.9in Bend Radius, 39.4in Length	0	In Stock	705	$705.00	ADD
76844	Bifurcated Liquid Light Guide, 220-600nm, 0.12in Core, 3.17in Com. & 39.4in Leg	99	Call	2069	$2,069.00	ADD
76847	Bifurcated Liquid Light Guide, 300-650nm, 0.12in Core, 3.17in Common & 79in Leg	6	6 Weeks	1471	$1,471.00	ADD
76848	Bifurcated Liquid Light Guide, 340-800nm, 0.12in Core, 3.17in Com. & 39.4in Leg	6	6 Weeks	1347	$1,347.00	ADD
76845	Bifurcated Liquid Light Guide, 220-600nm, 0.12in Core, 3.17in Common & 79in Leg	0	In Stock	2627	$2,627.00	ADD
76846	Bifurcated Liquid Light Guide, 300-650nm, 0.12in Core, 3.17in Com. & 39.4in Leg	6	6 Weeks	1347	$1,347.00	ADD
76840	Liquid Light Guide, 220-600nm, 0.12in Core, 1.6in Bend Radius, 39.4in Length	0	In Stock	817	$817.00	ADD
76842	Liquid Light Guide, 220-600nm, 0.2in Core, 2.4in Bend Radius, 39.4in Length	0	In Stock	1020	$1,020.00	ADD
76849	Bifurcated Liquid Light Guide, 340-800nm, 0.12in Core, 3.17in Common & 79in Leg	6	6 Weeks	1652	$1,652.00	ADD
76841	Liquid Light Guide, 220-600nm, 0.12in Core, 1.6in Bend Radius, 79in Length	6	6 Weeks	1092	$1,092.00	ADD
77569	Liquid Light Guide, 340-800nm, 0.2in Core, 2.4in Bend Radius, 79in Length	0	In Stock	530	$530.00	ADD
77554	Liquid Light Guide, 300-650nm, 0.12in Core, 1.6in Bend Radius, 39.4in Length	0	In Stock	223	$223.00	ADD
77568	Liquid Light Guide, 340-800nm, 0.2in Core, 2.4in Bend Radius, 39.4in Length	0	In Stock	365	$365.00	ADD
77635	Liquid Light Guide, 420-2000nm, 0.12in Core, 1.6in Bend Radius, 79in Length	0	In Stock	412	$412.00	ADD
77637	Liquid Light Guide, 420-2000nm, 0.2in Core, 2.4in Bend Radius, 79in Length	0	In Stock	561	$561.00	ADD
77555	Liquid Light Guide, 300-650nm, 0.12in Core, 1.6in Bend Radius, 79in Length	0	In Stock	340	$340.00	ADD
77567	Liquid Light Guide, 340-800nm, 0.12in Core, 1.6in Bend Radius, 79in Length	0	In Stock	340	$340.00	ADD
77636	Liquid Light Guide, 420-2000nm, 0.2in Core, 2.4in Bend Radius, 39.4in Length	0	In Stock	386	$386.00	ADD
77629	Liquid Light Guide, 300-650nm, 0.3in Core, 3.9in Bend Radius, 79in Length	0	In Stock	868	$868.00	ADD
77634	Liquid Light Guide, 420-2000nm, 0.12in Core, 1.6in Bend Radius, 39.4in Length	0	In Stock	309	$309.00	ADD
77639	Liquid Light Guide, 420-2000nm, 0.3in Core, 3.9in Bend Radius, 79in Length	0	In Stock	1055	$1,055.00	ADD
77557	Liquid Light Guide, 300-650nm, 0.2in Core, 2.4in Bend Radius, 79in Length	0	In Stock	462	$462.00	ADD
77566	Liquid Light Guide, 340-800nm, 0.12in Core, 1.6in Bend Radius, 39.4in Length	0	In Stock	255	$255.00	ADD
77628	Liquid Light Guide, 300-650nm 0.3in Core x 2.4In bend radius, 39.4 in Length	0	In Stock	580	$580.00	ADD
77631	Liquid Light Guide, 340-800nm, 0.3in Core, 3.9in Bend Radius, 39.4in Length	0	In Stock	667	$667.00	ADD

Fig. 4 Dimensional diagram of liquid light guides

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