Flat-top beam, Top hat beam, Super-Gaussian beam

Flat-top beam shaping for a Gaussian beam with a specific beam size and good beam quality

A laser beam with a top-hat uniform intensity distribution is desired in many applications. A top-hat beam is also called a flat-top beam or a super-Gaussian beam.

Basically we have 4 different methods to homogenize a laser beam, i.e.

(1) flat-top beam shaping for a Gaussian beam with a specific beam size and good beam quality

(2) Beam homogenizing tolerant to incident beam size and beam quality

(3) Diffuser, tolerant to incident beam size and beam quality

(4) beam homogenizing for incoherent beams with microlenses

The products that you are reading were designed and fabricated based on our first method of homogenizing an incident laser beam. The diffractive optical elements (DOEs) designed based on this approach are very sensitive to the conditions of usage:

1. The incident laser beam should be of Gaussian distribution.
2. The DOE has to be placed at the position of the laser beam's waist.
3. The incident laser spot on the DOE should be in agreement with the designed value (2 mm in 1/e^2 diameter).
4. The lateral alignment should be accurate.

If all these four conditions are satisfied, the DOEs' performance will be good, otherwise we cannot obtain desired flat-top output beam. By contrast, the DOEs designed based on the second approach are very tolerant to incident beam size and beam quality, without lateral or longitudinal alignment requirements.

Product nomination for diffractive top-hat beam-shaping elements

Our standard top-hat beam shaping elements include Gaussian beam to rectangular flat-top beam and Gaussian beam to circular flat-top beam.

Gaussian beam to rectangular flat-top beam:

2080 nm wavelength Gaussian beam to circular flat-top beam（13 models available. Please contact us for details）

Rectangular flat-top super-Guassian beam

Item No	DOE dimensions	Image size	Wavelength	Working distance	Delivery time
TH-REC-8-2-INF-20mrad-1064	8 mm	20 mrad	1064 nm	Infinite
TH-REC-8-2-200-4x4-1064	8 mm	4x4 mm	1064 nm	200 mm
TH-REC-8-2.5-INF-20mrad-1064	8 mm	20 mrad	1064 nm	Infinite
TH-REC-8-2.5-200-4x4-1064	8 mm	4x4 mm	1064 nm	200 mm
TH-REC-8-3-INF-20mrad-1064	8 mm	20 mrad	1064 nm	Infinite
TH-REC-8-3-200-4x4-1064	8 mm	4x4 mm	1064 nm	200 mm
TH-REC-8-3.5-INF-20mrad-1064	8 mm	20 mrad	1064 nm	Infinite
TH-REC-8-3.5-200-4x4-1064	8 mm	4x4 mm	1064 nm	200 mm
TH-REC-10-4-INF-20mrad-1064	8 mm	20 mrad	1064 nm	Infinite
TH-REC-10-4-200-4x4-1064	8 mm	4x4 mm	1064 nm	200 mm
TH-REC-20-8-INF-2.9 mrad-1064	20 mm	2.9 mrad	1064 nm	Infinite
TH-REC-20-8-1700-5x5-1064	20 mm	5x5 mm	1064 nm	1700 mm
TH-REC-8-3.5-100-0.5x0.5-532	8 mm	0.5x0.5 mm	532 nm	100 mm
TH-REC-8-3-200-4x4-532	8 mm	4x4 mm	532 nm	200 mm
TH-REC-8-3.5-200-0.5x0.5-532	8 mm	0.5x0.5 mm	532 nm	200 mm
TH-REC-8-3.5-200-1x1-532	8 mm	1x1 mm	532 nm	200 mm
TH-REC-8-3.5-INF-5mrad-532	8 mm	5 mrad	532 nm	Infinite
TH-REC-8-3.5-100-4.0x4.0-532	8 mm	4.0 x 4.0 mm	532 nm	100 mm
TH-REC-8-3.5-200-4.0x4.0-532	8 mm	4.0 x 4.0 mm	532 nm	200 mm
TH-REC-8-3.5-INF-40mrad-532	8 mm	40 mrad	532 nm	Infinite
TH-REC-10-4.0--100-0.5x0.5-532	10 mm	0.5x0.5 mm	532 nm	100 mm
TH-REC-10-4.0-INF-5mrad-532	10 mm	5 mrad	532 nm	Infinite
TH-REC-10-4.0-100-6.0x6.0-532	10 mm	6.0x6.0 mm	532 nm	100 mm
TH-REC-10-4.0--INF-59.9mrad-532	10 mm	59.9 mrad	532 nm	Infinite
TH-REC-12-5.0-100-0.2x0.2-532	12 mm	0.2x0.2 mm	532 nm	100 mm
TH-REC-12-5.0--INF-20mrad-532	12 mm	2 mrad	532 nm	Infinite
TH-REC-12-5.0-100-0.5x0.5-532	12 mm	0.5x0.5 mm	532 nm	100 mm
TH-REC-12-5.0-INF-5mrad-532	12 mm	5 mrad	532 nm	Infinite
TH-REC-12-5.0-200-8.0x8.0-532	12 mm	8.0x8.0 mm	532 nm	200 mm
TH-REC-12-5.0-INF-40mrad-532	12 mm	40.0 mrad	532 nm	Infinite
TH-REC-20-8.0-200-12x12-532	20 mm	12x12 mm	532 nm	200 mm
TH-REC-20-8.0-INF-99.7mrad-532	20 mm	99.7 mrad	532 nm	Infinite

Gaussian beam to circular flat-top beam:

Circular flat-top super-Guassian beam

Item No	DOE dimensions	Image size	Wavelength	Working distance	Delivery time
TH-RD-8-3.5-100-0.05-532	8 mm	0.05 mm	532 nm	100 mm
TH-RD-8-3.5-INF-0.5mrad-532	8 mm	0.5 mrad	532 nm	infinite
TH-RD-8-3.5-100-0.1-532	8 mm	0.1 mm	532 nm	100 mm
TH-RD-8-3.5--INF-1mrad-532	8 mm	1 mrad	532 nm	infinite
TH-RD-8-3.5-100-0.2-532	8 mm	0.2 mm	532 nm	100 mm
TH-RD-8-3.5-INF-2mrad-532	8 mm	2 mrad	532 nm	infinite
TH-RD-8-3.5-100-0.5-532	8 mm	0.5 mm	532 nm	100 mm
TH-RD-8-3.5-INF-5mrad-532	8 mm	5 mrad	532 nm	infinite
TH-RD-10-4.0-100-0.05-532	10 mm	0.05 mm	532 nm	100 mm
TH-RD-10-4.0-INF-0.5mrad-532	10 mm	0.5 mrad	532 nm	infinite
TH-RD-10-4.0-100-0.1-532	10 mm	0.1 mm	532 nm	100 mm
TH-RD-10-4.0-INF-1mrad-532	10 mm	1 mrad	532 nm	infinite
TH-RD-10-4.0-100-0.2-532	10 mm	0.2 mm	532 nm	100 mm
TH-RD-10-4.0-INF-2mrad-532	10 mm	2 mrad	532 nm	infinite
TH-RD-10-4.0-100-0.5-532	10 mm	0.5 mm	532 nm	100 mm
TH-RD-10-4.0-INF-5mrad-532	10 mm	5 mrad	532 nm	infinite
TH-RD-12-5.0-100-0.05-532	12 mm	0.05 mm	532 nm	100 mm
TH-RD-12-5.0-INF-0.5mrad-532	12 mm	0.5 mrad	532 nm	infinite
TH-RD-12-5.0-100-0.1-532	12 mm	0.1 mm	532 nm	100 mm
TH-RD-12-5.0-INF-1mrad-532	12 mm	1 mrad	532 nm	infinite
TH-RD-12-5.0-100-0.2-532	12 mm	0.2 mm	532 nm	100 mm
TH-RD-12-5.0-INF-2mrad-532	12 mm	2 mrad	532 nm	infinite
TH-RD-12-5.0-100-0.5-532	12 mm	0.5 mm	532 nm	100 mm
TH-RD-12-5.0-INF-5mrad-532	12 mm	5 mrad	532 nm	infinite
13 models available. Please contact us for details	7-18 mm	0.5 - 2 mm	2080 nm	300 mm	In stock

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Company and products brochure (PDF）（Updated on May 12 2014）

Company and products brochure (PDF）（Updated on July 4 2013）

Company and products brochure (PDF）（Updated on July 4 2012）