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Optical switch

About: Optical switch is a research topic. Over the lifetime, 28538 publications have been published within this topic receiving 351176 citations.


Papers
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Journal ArticleDOI
TL;DR: Chalcogenide glass fibers based on sulphide, selenide, telluride, and their rare earth doped compositions are being actively pursued both at the Naval Research Laboratory in Washington, D.C. and worldwide.
Abstract: Chalcogenide glass fibers based on sulphide, selenide, telluride, and their rare earth doped compositions are being actively pursued both at the Naval Research Laboratory in Washington, D.C. (NRL) and worldwide. Great strides have been made in reducing optical losses using improved chem ical purification techniques, but further improvements are needed in both purification and fiberization technology to attain the theoretical optical losses. Despite this, current singlemode and multimode chalcogenide glass fibers are enabling numerous applications. Some of these applications include laser power delivery, chemical sensing, imaging, scanning near field microscopy spectroscopy, fiber infrared (IR) sources lasers, amplifiers, and optical switches. The authors assert that the research and development of chalcogenide glasses will grow in the foreseeable future, especially with respect to improvements the optical quality of the fibers and the performance of the fibers in existing future applications.

89 citations

Patent
11 Jan 1995
TL;DR: In this article, a DMD-type imaging spatial light modulator (46) was used for exposing a xerographic printing apparatus (12) to expose the printing apparatus.
Abstract: An illumination system (10) for exposing a xerographic printing apparatus (12). The system (10) includes a DMD-type imaging spatial light modulator (46), and a DMD-type optical switch (26) for modulating the intensity of the source light (15) irradiating the imaging DMD (46). A single conventional continuous wave tungsten lamp (14) is implemented with its light energy directed by a condensing lens (20) onto the DMD optical switch (26). The DMD optical switch (26) modulates the incident light (15), and passes reflected light to a light integrator (38), which in turn homogenizes and increases the aspect ratio of the light. The light integrator (38) directs the homogenized light via an anamorphic lens (40) onto the imaging DMD (46). The light energy provided to the imaging DMD (46) is precisely modulated in intensity, while remaining uniformly disbursed. The combination incandescent lamp (14) and optical DMD switch (26) offers a low cost, high-intensity alternative to LED arrays.

89 citations

Journal ArticleDOI
01 Nov 1994
TL;DR: In this article, the authors describe the five switching fabric demonstrators constructed by AT&T in Naperville, IL, and discuss the architecture, optics, and optomechanics developed for each of the five demonstrators.
Abstract: Within the past 15 years there has been significant progress in the development of two-dimensional arrays of optical and optoelectronic devices. This progress has, in turn, led to the construction of several free-space digital optical system demonstrators. The first was an optical master-slave flip-flop using Hughes liquid-crystal light valves as optical logic gates and computer-generated holograms as the gate-to-gate interconnects. This was demonstrated at USC in 1984. Since then there have been numerous demonstrations of free-space digital optical systems including a simple optical computing system (1990) and five switching fabrics designated System/sub 1/ (1988), System/sub 2/ (1989), System/sub 3/ (1990), System/sub 4/ (1991) and System/sub 5/ (1993). The main focus of this paper will be to describe the five switching fabric demonstrators constructed by AT&T in Naperville, IL. The paper will begin with an overview of the SEED technology which was the device platform used by the demonstrators. This will be followed by a discussion of the architecture, optics, and optomechanics developed for each of the five demonstrators. >

89 citations

Patent
Tsutomu Aoyama1
27 Nov 1979
TL;DR: In this paper, a movable first optical path-changing means (8) and a fixed second and fixed third optical path changing means (12 and 13) associated to the first and second output optical fiber are provided.
Abstract: The mechanical optical switching device comprises an input optical fiber with a collimating lens (5) and a first and a second output optical fiber each with a converging lens (6 and 7, respectively) at the respective terminal ends. Further there are provided a movable first optical path-changing means (8) and a fixed second and a fixed third optical path-changing means (12 and 13) associated to the first and second output fiber, the three path-changing means (8, 12 and 13) comprising two reflecting surfaces each. For performing the switching operation the first optical path-changing means (8) may be inserted into the optical axis of the collimating input lens (5) or removed therefrom. In the removed position the input beam is directed towards the second output fiber via the third path-changing means (13) and the second output lens (7), and in the inserted position the input beam is directed towards the first output fiber via the first path-changing means (8), second path-changing means (12) and the first output lens (6) Preferably the first path-changing means (8) is a parallelogram prism with the two reflecting surfaces opposite to each other and the second and third path-changing means (12 and 13, respectively) are triangle prisms.

89 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202395
2022282
2021383
2020557
2019624
2018665