Design of a wavelength multiplexer–demultiplexer by the use of planar microlenses

E. Acosta; K. Iga

doi:10.1364/AO.33.003415

Applied Optics
Vol. 33,
Issue 16,
pp. 3415-3419
(1994)
•https://doi.org/10.1364/AO.33.003415

Design of a wavelength multiplexer–demultiplexer by the use of planar microlenses

E. Acosta and K. Iga

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E. Acosta and K. Iga, "Design of a wavelength multiplexer–demultiplexer by the use of planar microlenses," Appl. Opt. 33, 3415-3419 (1994)

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Abstract

The ray-tracing method is applied to design a wavelength multiplexer–demultiplexer by the use of planar microlenses as focusing and collimating elements. By simulating both uniform and Gaussian intensity distributions of the input sources, we find the position of the input–output components of the wavelength multiplexer–demultiplexer, which maximizes the coupling efficiency in each channel. Losses are also evaluated.

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Uniform Illumination	Channel 1	Channel 2	Channel 3
Input–substrate	T = 98%	T = 98%	T = 98%
Lens–substrate	T = 99%	T = 99%	T = 99%
Output–substrate	T = 98%	T = 98%	T = 98%
Mirror 1	R = 90%	R = 90%	R = 90%
Filter	R = 90%	T = 90%	T = 90%
Half-mirror	–	R = 80%	T = 20%
Mirror 2	–	–	R = 90%
Coupling efficiency	∊ = 97%	∊ = 96%	∊ = 95%
Total loss (dB)	1.2	2.2	9.1

Gaussian Illumination	Channel 1	Channel 2	Channel 3
Input–substrate	T = 98%	T = 98%	T = 98%
Lens–substrate	T = 99%	T = 99%	T = 99%
Output–substrate	T = 98%	T = 98%	T = 98%
Mirror 1	R = 90%	R = 90%	R = 90%
Filter	R = 90%	T = 90%	T = 90%
Half-mirror	–	R = 80%	T = 20%
Mirror 2	–	–	R = 90%
Couling efficiency	∊ = 100%	∊ = 100%	∊ = 100%
Total loss (dB)	1.1	2.0	8.8

Uniform Illumination	Channel 1	Channel 2	Channel 3
Input–substrate	T = 98%	T = 98%	T = 98%
Lens–substrate	T = 99%	T = 99%	T = 99%
Output–substrate	T = 98%	T = 98%	T = 98%
Mirror 1	R = 90%	R = 90%	R = 90%
Filter	R = 90%	T = 90%	T = 90%
Half-mirror	–	R = 80%	T = 20%
Mirror 2	–	–	R = 90%
Coupling efficiency	∊ = 97%	∊ = 96%	∊ = 95%
Total loss (dB)	1.2	2.2	9.1

Gaussian Illumination	Channel 1	Channel 2	Channel 3
Input–substrate	T = 98%	T = 98%	T = 98%
Lens–substrate	T = 99%	T = 99%	T = 99%
Output–substrate	T = 98%	T = 98%	T = 98%
Mirror 1	R = 90%	R = 90%	R = 90%
Filter	R = 90%	T = 90%	T = 90%
Half-mirror	–	R = 80%	T = 20%
Mirror 2	–	–	R = 90%
Couling efficiency	∊ = 100%	∊ = 100%	∊ = 100%
Total loss (dB)	1.1	2.0	8.8

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Applied Optics