Polarisation independent 1×16 and 1×32 lithium niobate optical switch matrices

O'Donnell, Alan

doi:10.1049/el:19911454

Cited by 21 publications

(4 citation statements)

References 1 publication

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“…On the contrary, its step-like switch response makes the DOS highly insensitive to wavelelength, polarisation, and other physical parameters that may affect switching. A variety of switch arras consisting of DOSs have already realised using LiNbO3 [17][18][19],III-V semiconductor [20], polymers [21], silicon resin [22] and silica on silicon [23].…”

Section: Digital Optical Switchmentioning

confidence: 99%

Digital optical switch based on amorphous silicon waveguide

et al. 2003

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The performances of a digital optical switch, based on the thermo-optic effect in amorphous silicon, are investigated for the first time to our knowledge. Numerical simulations show that the strong thermo-optic effect of amorphous silicon, combined with the possibility of realizing micrometric integrated structures, allows the realization of efficient waveguide devices capable of microsecond switching times. The switch, operating at the infrared communications wavelength of 1550 nm, can be easily integrated in silicon optoelectronic circuits and is thought for low-cost photonic applications.

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Section: Digital Optical Switchmentioning

confidence: 99%

Digital optical switch based on amorphous silicon waveguide

et al. 2003

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“…For these optical switching systems, some high-speed optical switch technologies [14][15][16] have been devised, among which, optical switches based on wavelength tunable lasers and arrayed waveguide gratings (AWGs) 17,18) can easily increase the number of input=output ports compared with other optical switches. This type of optical switch requires tunable lasers that are capable of not only high-speed wavelength switching but also have a wide tuning range, which realizes a large number of input=output ports.…”

Section: Introductionmentioning

confidence: 99%

High-speed and long-term wavelength stabilization of tunable distributed amplification distributed feedback laser after laser activation with feedforward and feedback control

Fukuda

Yamaguchi

Kuboki

et al. 2018

Jpn. J. Appl. Phys.

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To manage recent exponentially increasing data traffic, optical-to-optical burst switching and packet switching systems have been attracting much attention because they do not require an optical-to-electrical and an electrical-to-optical conversions. These systems require high-speed optical switches with a large number of input/output ports. As a candidate for the optical switch, we have focused on the combination of wavelength tunable lasers and an arrayed waveguide grating router, and studied the tunable distributed amplification distributed feedback (TDA-DFB) lasers for the optical switch. Previously, our derived feedforward current control achieved high-speed wavelength switching at a single laser in six-arrayed TDA-DFB lasers. For larger-scale optical switching, wavelength switching from a laser to another in an array is required to cover a wide tunable range. In this study, we develop a novel current control model and successfully stabilize the wavelength immediately after laser activation, which would enable high-speed switching between different lasers. Furthermore, we demonstrate the combination of feedforward and feedback controls for high-speed switching with long-term stability.

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“…[9][10][11] By contrast, the optical burst=packet switching system can switch without the electrical multiplexer=demultiplexer so that these systems can solve the above problems. [12][13][14] These optical switching systems need high-speed optical switches, such as semiconductor optical-amplifier-based gate switches, 15) lithium-niobate Mach-Zehnder-interferometer (MZI)-based directional coupler switches, 16,17) and wavelength-tunable lasers in combination with the arrayed waveguide grating (AWG). 18) The switch based on a wavelengthtunable laser has a large advantage from the viewpoints of power consumption and the number of components.…”

Section: Introductionmentioning

confidence: 99%

Sub-microsecond wavelength stabilization of tunable lasers with the internal wavelength locker

Kimura

Tatsumoto

Sakuma

et al. 2016

Jpn. J. Appl. Phys.

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We proposed a method of accelerating the wavelength stabilization after wavelength switching of the tunable distributed amplification-distributed feedback (TDA-DFB) laser using the internal wavelength locker to reduce the size and the cost of the wavelength control system. The configuration of the wavelength stabilization system based on this locker was as follows. At the wavelength locker, the light intensity after an optical filter is detected as a current by the photodiodes (PDs). Then, for estimating the wavelength, the current is processed by the current/voltage-converting circuit (IVC), logarithm amplifier (Log Amp) and field programmable gate array (FPGA). Finally, the laser current is tuned to the desired wavelength with reference to the estimated wavelength. With this control system the wavelength is stabilized within 800 ns after wavelength switching, which is even faster than that with the conventional control system.

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Polarisation independent 1×16 and 1×32 lithium niobate optical switch matrices

Cited by 21 publications

References 1 publication

Digital optical switch based on amorphous silicon waveguide

Digital optical switch based on amorphous silicon waveguide

High-speed and long-term wavelength stabilization of tunable distributed amplification distributed feedback laser after laser activation with feedforward and feedback control

Sub-microsecond wavelength stabilization of tunable lasers with the internal wavelength locker

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