Patent
Optical dispersion compensator
Tatemi Ido,Hirohisa Sano +1 more
Reads0
Chats0
TLDR
In this paper, the dispersion compensation wavelength and intensity of a semiconductor optical waveguide with a grating was adjusted by means of electrodes attached in the waveguide by a resistance heater.Abstract:
An optical signal is incident on a semiconductor optical waveguide with a grating (4) and is reflected or transmitted therethrough to thereby perform dispersion compensation. Application of an electric field or implantation of carriers can be effected in the optical waveguide by means of electrodes (5 and 6) attached in the optical waveguide. In addition, a temperature of the optical waveguide can be varied by a resistance heater (9). By using these measures, the dispersion compensation wavelength and the dispersion compensation intensity can be adjusted.read more
Citations
More filters
Patent
Optical fiber communication system incorporating automatic dispersion compensation modules to compensate for temperature induced variations
TL;DR: In this article, a data integrity monitor is configured to sense the integrity of transmitted data and to provide electrical feedback for controlling the current applied to the grating, and the magnitude of the applied current determines the dispersion of grating.
Patent
Variable dispersion compensator and optical transmission system
TL;DR: In this article, a variable dispersion compensator is proposed to provide high precision and controllability of dispersion compensation, and has a miniaturized optical circuit, and an optical transmission system comprising such variable dispensation compensator.
Patent
Dispersion compensation in optical fibre transmission
TL;DR: In this paper, a grating is connected in the link, the grating being chirped by an amount providing at least partial compensation of the dispersion characteristics of the link.
Patent
Nonlinear optical element
TL;DR: In this paper, a nonlinear optical element is disclosed for reducing intensity noise of both mark level and space level, and being stable, miniaturized and low-priced, which can be applied to the semiconductor waveguide layer, which has a band gap shorter than a wavelength of the signal light.
Patent
Mems-based polarization mode dispersion compensator
TL;DR: In this article, an apparatus for equalizing polarization mode dispersion in an optical signal traveling through an optical fiber is described. But the first variable delay generator is adapted to selectively provide a first propagation delay to the first polarized signal, and a beam combiner combines the first and second signals to form an optical output signal substantially compensated for polarization modes dispersion.
References
More filters
Patent
Optical fibre transmission systems
TL;DR: In this article, a chirped Bragg reflector formed in an optical fiber and a directional coupler for separating the reflected signal from the input signal is described. But this is not the case in the case of optical delay.
Patent
Adiabatic reflection apparatus
TL;DR: In this paper, a wavelength selective structure is coupled to an adiabatic Y-coupler via a multimode section which supports both symmetric and antisymmetric modes.
Patent
Grating coupler with monolithically integrated quantum well index modulator
TL;DR: In this paper, a grating coupler is combined with a quantum well index modulator and an optical waveguide to alter the reverse or forward coupling characteristics between two different propagation modes of the system.