| Patent Number |
Title Of Patent |
Date Issued |
| 7443569 |
Micro-electro-mechanical-system two dimensional mirror with articulated suspension structures fo |
October 28, 2008 |
| The invention provides a micro-electro-mechanical-system (MEMS) mirror device, comprising: a mirror having a 2-dimensional rotational T-shaped hinge at a first end, and having a flexible connection at a second end opposite the first end. The invention also provides a MEMS mirror device, |
| 7432629 |
Articulated MEMs structures |
October 7, 2008 |
| The present invention relates to an articulated micro-electro-mechanical (MEMS) device, which is constructed in such a way as to enable several of the devices to be closely packed together, i.e. high fill factor, for redirecting specific wavelengths of light from a dispersed optical sign |
| 7426347 |
Shared optical performance monitoring |
September 16, 2008 |
| An apparatus for shared optical performance monitoring (OPM) is provided. A wavelength sensitive device receives light at an input port and routes it wavelength selectively to a set of output ports. To perform optical performance monitoring on the output ports, a monitoring component of |
| 7321704 |
Wavelength cross connect with per port performance characteristics |
January 22, 2008 |
| A wavelength cross connect is provided in which there is a dispersive arrangement per port for each input port and each output port. Some of the dispersive arrangements have differing characteristics so as to result in different performances at the ports. The dispersive arrangements |
| 7302134 |
Wavelength selective switch with a 2D arrangement of optical ports |
November 27, 2007 |
| A wavelength cross connect is provided in which wavelength channels are individually switchable from one of a first set of ports to one of a second set of ports. Add and drop capability is provided on the sets of ports. Some embodiments feature a single row of ports, while others fea |
| 7236660 |
Reconfigurable optical add-drop module, system and method |
June 26, 2007 |
| An apparatus, system, and method for all-optical wavelength add-drop switching are provided. A number of optical ports, including at least one input port and at least one output port, are each optically coupled to a respective dispersive element. When a multichannel optical signal is |
| 7212704 |
Systems and methods for optical switching to colorless ports and colored ports |
May 1, 2007 |
| A wavelength selective switch is provided with a multiplexer such that both colourless (wavelength non-specific) and coloured (wavelength specific) ports are available. A waveguide device is employed with dispersive elements having different characteristics to realize the colourless |
| 7184665 |
Tunable dispersion compensator |
February 27, 2007 |
| A chromatic dispersion compensator in a single-pass and a double-pass version is disclosed. In a single-pass version, the compensator has a diffractive grating for spatially separating an input optical signal into spatially spaced frequency components and a MEMS array of separate phase |
| 7095546 |
Micro-electro-mechanical-system two dimensional mirror with articulated suspension structures fo |
August 22, 2006 |
| The invention provides a micro-electro-mechanical-system (MEMS) mirror device, comprising: a mirror having a 2-dimensional rotational articulated hinge at a first end, and having a 1-dimensional rotational articulated hinge at a second end opposite the first end; a movable cantilever |
| 7088882 |
Wavelength cross-connect |
August 8, 2006 |
| A wavelength cross connect is provided in which wavelength channels are individually switchable from one of a first set of ports to one of a second set of ports. Add and drop capability is provided on the sets of ports. Some embodiments feature a single row of ports, while others fea |
| 7039267 |
Optical switch |
May 2, 2006 |
| The invention provides an optical switch having a pair of opposed optical arrays, each optical array including a fixed mirror and a plurality of independently tiltable mirrors, at least one input port for launching a beam of light into the optical switch, said input port being disposed |
| 7027684 |
Wavelength selective switch |
April 11, 2006 |
| A wavelength selective switch is realized by combining a quantized dispersion element and an array of switching means. The quantized dispersion element enables to concentrate all the wavelengths within predetermined wavelength bands onto the same location in the switching array. With |
| 7014326 |
Wavelength blocker |
March 21, 2006 |
| A wavelength blocker including an input port for launching an input beam of light, first dispersing means for dispersing the input beam of light according to wavelength, an array of independently addressable elements for selectively blocking a portion of the dispersed beam of light, seco |
| 6765679 |
Multi-cavity interferometer with dispersion compensating resonators |
July 20, 2004 |
| Interleavers, based on a Michelson interferometer with a Gires-Tournois (GT) etalon in each arm, are becoming popular in the filtering of light in the fiber optics telecommunications industry. As the channel spacing becomes closer together, e.g. 50 GHz or 25 GHz, dispersion compensation |
| 6721477 |
Dispersion-free optical filters |
April 13, 2004 |
| The filtering of optical signals, and in particular the interleaving/de-interleaving of optical signals is becoming a necessary step in Dense-Wavelength Division Multiplexing (D-WDM), because of a requirement for smaller channel spacing due to higher levels of traffic. Finite Impulse |
| 6711316 |
Wavelength cross-connect |
March 23, 2004 |
| An optical cross-connect having an input port for launching a beam of light into the optical cross-connect, at least two output ports, each output port for selectively receiving a beam of light, a dispersive element for dispersing the beam of light into separate wavelength channels, and |
| 6707959 |
Wavelength switch |
March 16, 2004 |
| A fiber optic wavelength switch that includes a front-end unit having optical ports for receiving and transmitting optical signals; a wavelength dispersion element (e.g., diffraction grating, prism, etc.) for defining a dispersion plane; a light redirecting element (e.g., spherical refle |
| 6683721 |
Low dispersion interleaver |
January 27, 2004 |
| The present invention relates to an interferometer useful in the interleaving and de-interleaving of optical wavelength channels. Typically the invention comprises a beamsplitter and two resonators, e.g. GT etalons or ring resonators. The beamsplitter splits an input beam of light into a |
| 6657785 |
Bi-directional circulator |
December 2, 2003 |
| The present invention relates to bi-directional circulators based on interleaver technology, e.g. birefringent crystal interleaver technology, that enables signals containing even number ITU channels to travel in one direction through the device, while signals containing odd number ITU |
| 6618517 |
Cascadable large optical cross-connect |
September 9, 2003 |
| A high capacity cross-connect in which a 3D switch core includes express paths that facilitate cascading of cross-connect blocks. A light beam propagates from an input waveguide 18 to a first MEMS mirror, which deflects the light beam to either an express optical path or a switching |
| 6600849 |
Control system for optical cross-connect switches |
July 29, 2003 |
| A control system is designed to control an optical cross-connect having a switch core defined by first and second independently movable beam deflectors capable of selectively defining an optical path between a pair of ports of the optical cross-connect. An optical element having optical |
| 6587266 |
Bi-directional isolator |
July 1, 2003 |
| Bi-directional wavelength interleaving optical isolators provide the ability to pass a first set of optical signals (e.g., ITU even channels) from a first port to a second port, while preventing a second set of optical signals from passing thereto. The bi-directional wavelength inter |
| 6577398 |
Resonant optical cavity |
June 10, 2003 |
| A resonant optical cavity is disclosed that has a first partially reflective input end face and a second partially reflective end spaced a predetermined distance apart. The cavity is substantially angle insensitive to a beam of light launched into the cavity at a non-normal angle of |
| 6570711 |
Virtual waveplate and optical channel interleaver formed therewith |
May 27, 2003 |
| A conventional interleaver, based on a stack of waveplates, relies on the orientation and the birefringence of the waveplates to differentiate the polarizations of one set of channels from another, so that the one set of channels can be separated from the other. The present invention rel |
| 6560000 |
Wavelength-dependent optical signal processing using an angle-to-offset module |
May 6, 2003 |
| An optical device comprises a dispersion element, a reflector, and an angle-to-offset (ATO) element. The angle-to-offset (ATO) element has optical power. The dispersion element is positioned in or near a focal plane of the ATO element and adapted to separate an input wavelength divis |
| 6510003 |
Cylindrical polarization diversity assembly |
January 21, 2003 |
| The invention provides a cylindrical polarization diversity circuit for narrowing the numerical aperture of an incoming beam of light in a direction perpendicular to the dispersion direction and without affecting the numerical aperture of the incoming beam of light in the direction of |
| 6498872 |
Optical configuration for a dynamic gain equalizer and a configurable add/drop multiplexer |
December 24, 2002 |
| An optical device for rerouting and modifying an optical signal that is capable of operating as a dynamic gain equalizer (DGE) and/or a configurable optical add/drop multiplexer (COADM) is disclosed. The optical design includes a front-end unit for providing a collimated beam of ligh |
| 6487334 |
Optical switch |
November 26, 2002 |
| The invention provides an optical switch having an input port for launching a beam of light into the optical switch, at least two output ports, each output port for selectively receiving a beam of light, an ATO element having optical power for providing an angle to offset transformation, |
| 6441939 |
Device and method for regenerating a train of solitons |
August 27, 2002 |
| In the invention, a stream (S) of solitons enters a Sagnac interferometer (6) with an offset semiconductor amplifier (A) and the amplifier is controlled by an optical synchronization signal (Y) that is amplitude-modulated at a frequency which is half a bit frequency of the stream, th |
| 6424443 |
Optical signal resynchronization method and device |
July 23, 2002 |
| To resynchronize input optical signals with different optical carrier frequencies f1, f2 a delayed optical signal is created by applying a variable time-delay to one of the signals. A combination signal is formed by coupling measurement optical signals respectively obtained from the |
| 6411409 |
Compact diffraction grating based WDM demux |
June 25, 2002 |
| In the area of wavelength division multiplexing (WDM), the present invention relates to a demultiplexer/multiplexer based on a diffraction grating, in which a beam of light is separated into two orthogonally polarized sub-beams prior to beam collimation. Due to the characteristics of |
| 6381052 |
Multiplexors with a flat top spectral channel shape |
April 30, 2002 |
| A multiplexing/demultiplexing optical circuit provides a demultiplexed output spectrum of channels having a flat amplitude response without sacrificing optical power. A phased array implementation and a diffraction grating implementation both rely on a first dispersion of the beam to be |
| 6327280 |
Custom optical filters |
December 4, 2001 |
| This invention relates generally to custom optical filters such as filters relating to, flat-top WDM multiplexer/demultiplexers, flat-top and peaky comb filters or reconfigurable add & drop filters. The embodiment disclosed below is based on mid-dispersion wavelength bands processing, |
| 6118117 |
Optical preamplifier device having a wave length conversion device |
September 12, 2000 |
| An optical preamplifier device for a light receiver, the device including a first optical amplifier. The first optical amplifier is coupled to an input of an optical filter centered around a fixed wavelength .lambda..sub.o via a wavelength conversion device for converting wavelength |
| 6040938 |
Semiconductor optical amplifier |
March 21, 2000 |
| A semiconductor optical amplifier includes in integrated form a linear response attenuation segment in series between first and second amplification segments. The amplifier can be used to implement a high-speed wavelength converter that can be used with advantage in an optical teleco |
| 5654822 |
Optical amplifier with low crosstalk and component including this amplifier |
August 5, 1997 |
| A semiconductor substrate includes an active waveguide to guide optical signals to be amplified occupying signal channels within a gain band of the waveguide. A stabilizer system comprises two Bragg reflectors tuned to a resonant wavelength in the gain band but outside the signal channel |
