Computer-generated holograms: application to intensity variable and wavelength demultiplexing holograms

Masaru Kato; Kyohei Sakuda

doi:10.1364/AO.31.000630

Applied Optics
Vol. 31,
Issue 5,
pp. 630-635
(1992)
•https://doi.org/10.1364/AO.31.000630

Computer-generated holograms: application to intensity variable and wavelength demultiplexing holograms

Masaru Kato and Kyohei Sakuda

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Masaru Kato and Kyohei Sakuda, "Computer-generated holograms: application to intensity variable and wavelength demultiplexing holograms," Appl. Opt. 31, 630-635 (1992)

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Abstract

We report two kinds of Fresnel-type computer-generated hologram, namely, an intensity variable hologram and a wavelength demultiplexing hologram. The former shows that diffraction intensity can be controlled almost independently by the spatial frequencies of the holograms. The latter shows wavelength demultiplexing holograms. Combining the former intensity-controlled holograms, uniform diffraction intensity of different wavelengths can be realized.

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Focal distance of lens (f)	f = 55 mm
F-number	F = 1:3.5
Resolution	Approximately 40 lines/mm
Focal distance of lens ( f)	f = 50 mm
F-number	F = 1:1.4
Resolution	Approximately 115 lines/mm

Hologram size	approximately 16 × 11 mm
Focal distance	1500 mm
First-order diffraction	7.30 μW	1.05 μW
Light power	(1153.0 nm)	(632.8 nm)
Nondiffracted light power	140 μW	140 μW

Hologram size	Approximately 16 mm × 11 mm
Focal distance	2000 mm
First-order diffracted light power	0.48 μW (for 488 nm)
	0.61 μW (for 633 nm)
	0.75 μW (for 1153 nm)
	0.76 μW (for 1300 nm)
	0.87 μW (for 1550 nm)
Incident light power	37.5 μW
Power ratio between diffracted and input beams	9.25%

Position	First-order Diffracted Light Power (μW)	Power Ratio
Position	First-order Diffracted Light Power (μW)	Experimental Value	Theoretical Value
A	0.516	24.3	25
B	0.356	16.8	16
C	0.191	9.0	9
D	0.086	4.1	4
E	0.023	1.1	1
Power ratio between diffracted and input beams	2.60%

Focal distance of lens (f)	f = 55 mm
F-number	F = 1:3.5
Resolution	Approximately 40 lines/mm
Focal distance of lens ( f)	f = 50 mm
F-number	F = 1:1.4
Resolution	Approximately 115 lines/mm

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Equations (8)

Applied Optics