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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: In this paper, a high speed optical switching gain based Erbium doped fiber amplifier model is proposed to minimize the optical fiber loss and the system is stabilized with the power budget of 25.875mW a long 75 km as a length of optical fiber in this study can be verified.
Abstract: This study presents high speed optical switching gain based Erbium doped fiber amplifier model. By using the proposed model the optical fiber loss can be minimized. The system is stabilized with the power budget of 25.875 mW a long 75 km as a length of optical fiber in this study can be verified. The modulation rate of 10 Gb/s can be upgrade up to reach 30 Gb/s. The suitable power for the optical transmitter is −2.440 dBm and NRZ modulation code is verified. The receiver sensitivity can be upgraded with the minimum bit error rate and max Q factor are 1.806 e−009 and 5.899.

75 citations

Journal ArticleDOI
TL;DR: In this article, a thermally actuated latching wideband RF microelectromechanical systems (MEMS) switch is presented, which employs two thermal actuators connected to two thin metal arms which serve as signal lines of coplanar waveguide switch.
Abstract: Here, a new thermally actuated latching wideband RF microelectromechanical systems (MEMS) switch is presented. The switch employs two thermal actuators connected to two thin metal arms which serve as signal lines of coplanar waveguide switch. The actuators pull the thin arms sequentially, and latch the switch. The switch can be actuated on and off by using either short voltage or current pulses. Using a dielectric bridge (nitride) as an interface between the actuators and the thin arms, the RF circuitry is separated from DC actuators, allowing wide-band operation. The switch demonstrates an excellent wideband RF performance with an insertion loss of better than 0.3 dB up to 20 GHz and better than 0.8 dB up to 40 GHz. The return loss and isolation of the switch is better than 20 dB for the entire frequency band. The switch also has a very satisfactory repeatability with better than 0.1-dB variation in insertion loss and less than 1-dB variation in return loss and isolation at 30-dB level up to 6000 times switching cycles. The switch has been also successfully tested for RF power handling capability up to 40 dBm. The proposed switch has very simple RF structure which makes it an ideal candidate to be integrated in the form of more complex circuitry. An application of the proposed switch for a band selection network which is used in multiband transceivers has been presented here.

74 citations

Journal ArticleDOI
TL;DR: In this paper, a technique called PISIC (pre-impulse step-injected current) was proposed to reduce the SOA switching time from almost 2 ns (simple-step current response) to little more than 200 ps (step with prepulse response).
Abstract: A practical way to implement a technique for the reduction of the semiconductor optical amplifier electrooptic switching time is presented. The technique, called PISIC (preimpulse step-injected current), was tested and achieved a reduction of the SOA switching times from almost 2 ns (simple-step current response) to little more than 200 ps (step with prepulse response). Forecasts obtained through simulations, using optimized values of current step and prepulse, showed even a faster optical switch response, with switching time reduction to values around 10 ps.

74 citations

Patent
31 Jan 1997
TL;DR: In this paper, a pin grid actuator is used to selectively position optical elements relative to optical beams in a cross-connect switch, and a high density array of aligned, optically reflective elements is attached to the ends of independently selectable and moveable pins in the actuator.
Abstract: An optical cross-connect switch incorporates a pin grid actuator to selectively position optical elements relative to optical beams in the switch. A high density array of aligned, optically reflective elements is attached to the ends of independently selectable and moveable pins in the pin grid actuator. The pin grid actuator is the type extensively used in dot matrix printers. Linear motion of the pins causes the reflective element attached to the pin to intercept optical beams provided by input fibers coupled to the switch. Intercepted optical beams are redirected to designated output fibers, also coupled to the switch. A staggered arrangement of the input and output fibers equalizes all of the signal pathlengths through the switch, regardless of which pin in the pin grid actuator is selected. According to an alternate preferred embodiment of the present invention, multiple optical cross-connect switches are cascaded using a staggered arrangement of interconnecting fibers.

74 citations

Journal ArticleDOI
TL;DR: It is demonstrated that the concept under bursty, both time-slotted and asynchronous traffic conditions, can lead to a sizable reduction in buffer depth requirements compared to conventional solutions.
Abstract: We describe a new methodology for analyzing optical buffers with nonuniform distribution of the delay lines, the nondegenerate buffers. Coupled with an intelligent scheduling algorithm, it features improved system performance leading to more efficient and larger optical buffers. We demonstrate that the concept under bursty, both time-slotted and asynchronous traffic conditions, can lead to a sizable reduction in buffer depth requirements compared to conventional solutions.

74 citations


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