Patent
Fiber optic bidirectional wavelength division multiplexer/demultiplexer with total and/or partial redundancy
Scott F. Large,Bruce D. Metcalf +1 more
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TLDR
In this article, the wavelength division multiplexer/demultiplexer includes a gradient index of refraction (GRIN) lens and a diffraction grating located adjacent to one end of the GRIN lens.Abstract:
The wavelength division multiplexer/demultiplexer includes a gradient index of refraction (GRIN) lens and a diffraction grating located adjacent to one end of the GRIN lens. The diffraction grating is adapted for switching from a first angle to a second angle with respect to the GRIN lens. For both path and terminal equipment redundancy, first and second input optical fibers are located at first and second input locations on an end surface of the GRIN lens. A first and a second plurality of output optical fibers are also located on this end surface of the GRIN lens. The input and output optical fibers are located so that optical energy will travel from the first input optical fiber to the first plurality of output optical fibers when the diffraction grating is oriented at the first angle and optical energy will travel from the second input optical fiber to the second plurality of output optical fibers when the diffraction grating is oriented at the second angle.read more
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Patent
Wavelength stabilized laser sources using feedback from volume holograms
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References
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Patent
Optical switching device
TL;DR: In this paper, the end faces of two or more optical waveguides (23 to 29) are connected on one end face of a focussing rod lens (20) and a reflection means (21) having a reflection plane tilted with a specified angle (α) to the normal plane to the lens axis is disposed behind the other end face.
Patent
Wavelength division multiplexer
TL;DR: In this paper, a multiplexer/demultiplexer for optical fibers is described that features a reflection diffraction grating and a graded refractive index rod in a rugged, compact assembly having low insertion loss and low crosstalk.
Patent
Fiber optics communications modules
TL;DR: A fiber optics coupler module has a portion defining a spherical reflective surface characterized by a selfconjugate plane having the property that a point source of light in the self-conjugATE plane is imaged in the Self-Conjugate Plane.
Patent
Optical wavelength-division multiplexing and demultiplexing device
TL;DR: An optical multiplexer-demultiplexer consisting of a light-focusing transmission body having a radially graded refractive index distribution and a reflection or transmission type diffraction grating was proposed in this article.
Journal ArticleDOI
20-channel micro-optic grating demultiplexer for 1.1-1.6 μm band using a small focusing parameter graded-index rod lens
TL;DR: In this article, a 20-channel micro-optic grating demultiplexer with a singlemode input fiber was developed for 1.1-1.6 μm band using a newly developed graded-index (Selfoc) rod lens with a small focusing parameter and an Si-etched reflection grating.