Assignee: Wavesplitter Technologies, Inc.

Location: Fremont, CA
No. of patents: 21

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Number	Title	Issue Date
8111737	Bidirectional digital communication circuit and a bidirectional digital communication method A bidirectional digital communication circuit and a bidirectional digital communication method for combining multi-channel signals to a duplex digital communication system apply time division multiplexing. The signals can be unidirectional and bidirectional; signals...	02/07/2012
7939790	Method and apparatus for controlling the gain of an avalanche photodiode with fluctuations in temperature A method and apparatus is provided for biasing an avalanche photodiodes (APD). The method includes developing a first output signal s(v1) from the APD when biased with a first bias voltage v1 and developing a second output signal s(v2	05/10/2011
7006729	Optical components having reduced insertion loss An optical device is provided which includes a slab waveguide and at least one input waveguide coupled to a first side of the slab waveguide. The device also includes a plurality of output waveguides coupled to a second side of the slab waveguide. The slab waveguide...	02/28/2006
6917760	Wide passband optical interleaver A method and apparatus is provided for reformatting or interleaving a WDM signal that includes a plurality of optical channels having a first bandwidth and a first channel spacing. The method begins by receiving the WDM signal and dividing it into first and second s...	07/12/2005
6836588	Optical signal interleaving comb filter with reduced chromatic dispersion and applications therefor Optical signal interleaver/deinterleavers with reduced chromatic dispersion are described. In one embodiment, the interleaver/deinterleavers include two optical filters and an optical isolator coupled to receive the output of each of the optical filters. The optical...	12/28/2004
6834141	Wide pass-band interferometric optical device utilizing an optical ring-resonator A filtering device such as an optical interleaver/deinterleaver includes first and second optical couplers each having two inputs and two outputs. The inputs of the first coupler are adapted to receive input optical signals to be filtered and the outputs of the seco...	12/21/2004
6829410	Optical signal interleaving comb filter with reduced chromatic dispersion and applications therefor Optical signal interleaver/deinterleavers with reduced chromatic dispersion are described. In one embodiment, the interleaver/deinterleavers include two optical filters and an optical isolator coupled to receive the output of each of the optical filters. The optical...	12/07/2004
6782157	Bidirectional optical interleaver The abstract is amended to read, “An inventive method and apparatus is provided by a bidirectional optical 1×2 device formed by a cascade of three optical 2×2 devices. Each 2×2 device is bidirectional where optical signals propagate through the 2×2 device in t...	08/24/2004
6768843	Cascaded fourier filter interleaver having enhanced performance A cascaded interleaver includes at least three two-stage Fourier filters. A first of the Fourier filters includes first and second waveguides such that the first waveguide has a longer optical path length than the second waveguide. A second of the Fourier filters in...	07/27/2004
6765172	Laser fusion based WDM coupler A method is described that involves scanning a laser beam across and applying a stretching force to a fusion region that is formed by a neighboring pair of optical fibers that include a core and a cladding layer. The scanning and applying occurs while the optical pe...	07/20/2004
6703588	Compact, thermally stabilized housing for planar lightguide circuits A housing is provided for maintaining a planar lightguide circuit at a temperature within a predetermined temperature range independent of ambient temperature. The housing includes a planar heating arrangement supporting and in thermal contact with the pl...	03/09/2004
6701056	Modular, variably configurable retainer assembly for optical components A variably configurable and modular retainer for various discrete optical components (such as passive optical elements and mass fusion splices) is provided by a substantially planar base having an optical component support surface. Complementary finger pa...	03/02/2004
6658181	Polarization interleaver A method and apparatus provides a WDM optical signal having a plurality of channels with a pair-wise orthogonal polarization state. The method begins by receiving a plurality of unpolarized optical wavelengths defining a plurality of optical channels sepa...	12/02/2003
6643448	Optical fiber stripping tool A method and apparatus is described for stripping the coating of an optical fiber. A fixture having a fiber cleat may be used to secure an optical fiber to enable removal of the protective coating from the fiber along a precise length of the fiber. The le...	11/04/2003
6636661	Optical signal interleaving comb filter with reduced chromatic dispersion and applications therefor Optical signal interleaver/deinterleavers with reduced chromatic dispersion are described. In one embodiment, the interleaver/deinterleavers include two optical filters and an optical isolator coupled to receive the output of each of the optical filters. ...	10/21/2003
6618525	Motorized vacuum twist fixture A system and method for twisting together two fibers to create an optical fiber coupler is disclosed. In one embodiment, the two optic fibers are threaded through a chuck, which is rotated by a motor to create an amount of twist in the two optical fibers ...	09/09/2003
6498879	Polarization-independent, environmentally stable optical fiber narrow band multi-window wavelength division multiplexer based on biconical tapered fusion coupler technology A structure and method are provided to improve stability of a multi-window dense wavelength division multiplexers and to provide polarization-independent multi-window dense wavelength division multiplexers. In one embodiment, the coupler region of a multi...	12/24/2002
6324322	Fused-fiber multi-window wavelength filter using unbalanced Michelson Interferometer A fused-fiber multi-window wavelength filter (MWF) is constructed with an unbalanced Michelson Interferometer, in which input light passing through the fused coupling region is decoupled and travels along two fibers of different optical path lengths. The ...	11/27/2001
6263128	Fiber unbalanced Mach-Zehnder interferometers with flat-top spectral response for application in wavelength division multiplexers According to the present invention, a multi-window wavelength division multiplexer (MWDM) is coupled to a correcting filter characterized by a shallow modulation depth and a channel separation smaller than the MWDM. A correcting filter is coupled to an in...	07/17/2001
6256433	Expandable interleaving optical add/drop filter module An optical add/drop filter (OADF) module is provided that is capable of only utilizing one filter to drop and add multiple channels from a multiplexed signal. In one embodiment, a demultiplexer separates the input signal into groups of signals or channels...	07/03/2001
6160932	Expandable wavelength division multiplexer based on interferometric devices A wavelength division multiplexer (WDM) utilizes cascaded interferometric devices, where the two output branches of interferometric devices in each new stage are each coupled to an additional stage of interferometric devices having the same wavelength sep...	12/12/2000

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Assignee: Wavesplitter Technologies, Inc.