1D and 2D Diffractive Beam Splitters

Beam splitting turns a single laser beam or LED beam to multiple beamlets. These beamlets may be arranged regularly or irregularly. Beam splitters may also be referred to as fan-out elements, spots array generators, multiple beam gratings, etc

Beam splitting is desired in many applications, including laser materials processing, optical communications, optical image processing, microelectronics, microscopy. Specific examples are % simultaneous laser drilling (perforating) of multi-holes, fiber coupling, etc. We can split a single beam into up to a million highly uniform beams.

Beam splitting is easy to describe, but it can be difficult to achieve, particularly if the diffraction efficiency and uniformity are expected to be high. There are several approaches to design and accomplish this task, e.g. lenslet arrays, rectangular profile periodic gratings, Dammann gratings and more recently circular Dammann gratings, nonperiodic binary or multilayer diffractive optical elements. We use different approaches for different requirements.

Beam splitter model illustration: 

We provide the following standard Beam Splitting DOEs.

1-D beam splitting / Fan-out:

Item No	DOE receiving size	Description	Separation angle	Wavelength
BS-1D-8-1x3-4.7DEG-650	5x5.5 mm2	1x3	a: 4.7DEG b: 9.4DEG	650 nm	Added on 21 June 2018 Very low non-uniformity error
BS-1D-8-1x5-3.4DEG-450	5x5.5 mm2	1x5	a: 3.4DEG b: 13.7DEG	450 nm
BS-1D-8-1x7-3.4DEG-450	5x5.5 mm2	1x7	a: 3.4DEG b: 20.4DEG	450 nm
BS-1D-8-1x7-4.6DEG-650	5x5.5 mm2	1x7	a: 4.6DEG b: 27.8DEG	650 nm
BS-1D-8-1x7-4.9DEG-650	5x5.5 mm2	1x7	a: 4.9 DEG b: 29.5DEG	650 nm
BS-1D-8-1x13-4DEG-650	8x8 mm2	1x13	a: 4 DEG b: 48DEG	650 nm	Added on 17 Oct 2014
BS-1D-25-1x9-0.64DEG-532	3x3 mm2 to 25x25 mm2	1x9	a: 600 urad b: 4.8 mrad	532 nm	Added on 16 June 2014
BS-1D-8-1x9-600urad-532	8x8 mm2	1x9	a: 600 urad b: 4.8 mrad	532 nm	Added on 16 Oct 2013
BS-1D-8-1x9-8deg-532	8x8 mm2	1x9	a: 8 deg b: 64 deg	532 nm	Added on 16 Otc 2013
BS-1D-8-1x16-2mrad-1064	8x8 mm2	1x16	a: 2 mrad b: 30 mrad	1064 nm	Added on 18 Sep 2013
BS-1D-8-1x50-3mrad-1064	8x8 mm2	1x50	a: 3 mrad b: 147 mrad	1064 nm
BS-1D-55-1x100-120urad-532	53x53 mm2	1x100	a: 120 urad b: 12 mrad	532 nm
BS-1D-8-1x3-40DEG-808	8x8 mm2	1x3	a: 40 DEG b: 80 DEG	808 nm
BS-1D-8-1x24-0.17DEG-650	7.5x7.5 mm2	1x24	a: 0.17 DEG b: 4.0 DEG	650 nm
BS-1D-8-1x25-0.17DEG-650	7.5x7.5 mm2	1x25	a: 0.17 DEG b: 4.2 DEG	650 nm
BS1D1-14	6.5 x 6.5 mm	1 x 11	a: 19.84 mrad b: 198.36 mrad	650 nm
BS1D1-15	6.5 x 6.5 mm	1 x 21	a: 9.92 mrad b: 198.36 mrad	650 nm
BS1D1-16	3.25 x 3.25 mm	1 x 21	a: 9.52 mrad b: 190.43 mrad	650 nm

　

2-D beam splitting / Fan-out: