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Related Concept Videos

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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Wavelength-multiplexed optical packet switching using InP phased-array switch.

Takuo Tanemura1, Koji Takeda, Yoshiaki Nakano

  • 1Research Center for Advanced Science and Technology, University of Tokyo,4-6-1Komaba, Meguro-Ku, Tokyo, 153-8904, Japan. tanemura@ee.t.u-tokyo.ac.jp

Optics Express
|May 26, 2009
PubMed
Summary
This summary is machine-generated.

A new InP/InGaAsP optical phased-array switch enables error-free forwarding of high-speed wavelength-division multiplexed (WDM) signals for optical packet switching (OPS). This broadband switch minimizes distortion and crosstalk, crucial for advanced WDM-OPS applications.

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Area of Science:

  • Photonics and Optical Engineering
  • Integrated Optics
  • Telecommunications

Background:

  • Broadband wavelength-division multiplexed (WDM) optical packet switching (OPS) demands high-performance switching components.
  • Existing switches often suffer from nonlinear signal distortion and inter-channel crosstalk, limiting performance.
  • Monolithic integration offers a path to compact and efficient optical switching solutions.

Purpose of the Study:

  • To demonstrate a monolithically integrated InP/InGaAsP optical phased-array switch for WDM-OPS.
  • To evaluate the switch's performance in handling high-speed WDM signals.
  • To assess the suitability of the switch for broadband optical packet routing.

Main Methods:

  • Fabrication of a monolithically integrated InP/InGaAsP optical phased-array switch.
  • Testing the switch's performance with a 320-Gbps (40-Gbps x 8 channel) WDM signal.
  • Evaluation of signal integrity, including power penalty, nonlinear distortion, and inter-channel crosstalk.
  • Demonstration in a WDM-OPS testbed for synchronous payload routing.

Main Results:

  • Error-free forwarding of a 320-Gbps WDM signal with a low penalty (<1.3 dB) was achieved.
  • The phase-modulating-only design eliminated nonlinear signal distortion and inter-channel crosstalk.
  • A large dynamic range of input power was supported due to the absence of distortion.
  • Successful demonstration in a WDM-OPS testbed, routing WDM payloads synchronously to optical labels.

Conclusions:

  • The integrated InP/InGaAsP optical phased-array switch is a viable component for broadband WDM-OPS.
  • The switch's design offers superior signal integrity and robustness against nonlinear effects.
  • This technology enables efficient and high-performance optical packet switching for future communication networks.