OPTICAL TRANSMITTER WITH MACH-ZEHNDER MODULATOR AND METHOD FOR OPERATING THE SAME
Granted: July 8, 2021
Application Number:
20210211202
The present disclosure provides a dither-free bias control of an optical modulator (OM) for the externally-modulated transmitter with the silicon-based Mach-Zehnder modulator (MZM), while the nonlinear distortions (NLDs) are generated by the plasma dispersion effect of the silicon-based MZM. The present disclosure proposes to intentionally offset the bias point of the MZM from its quadrature points, and therefore the Mach-Zehnder interference (MZI)-induced even-order NLDs can be…
PLUGGABLE MINIATURE OPTICAL PASSIVE DEVICE
Granted: July 30, 2020
Application Number:
20200241210
A pluggable miniature optical passive device comprises a casing (30), an optical device (40) is mounted in the casing (30), a first end of the optical device (40) is provided with a first ceramic ferrule (43). At least one fiber core (432) is provided in the first ceramic ferrule (43), a first end (41) of the first ceramic ferrule (43) extends out of the casing (30). A second end (42) of the first ceramic ferrule (43) is positioned in the optical device (40), and the second end (42) of…
OPTICAL AMPLIFIER
Granted: September 6, 2018
Application Number:
20180254599
An optical amplifier includes an input port for receiving an input optical signal;a wavelength division multiplexer (204) having a first input coupled to the input port, a second input coupled to a pump source (206), and an output coupled to an amplification fiber (208); and an integrated component (210) configured to provide output monitoring and isolation, wherein the integrated component (210) is configured to separate a first portion of a light signal received from the amplification…
OPTICAL FIBER CONNECTION SYSTEM
Granted: August 16, 2018
Application Number:
20180231722
The present disclosure provides an optical fiber receptacle, an optical fiber connection device and an optical fiber receptacle module. The optical fiber receptacle comprises a housing, a plurality of positioning hooks and at least one clamping unit. The housing has a rear wall, and at least one slot opened on an opposite side of the rear wall. The rear wall has an inner surface facing the slot and an outer surface opposite to the inner surface, the slot is used to be inserted by an…
N-DEGREE CDC WSX ROADM
Granted: July 5, 2018
Application Number:
20180192169
An apparatus includes a plurality of ingress ports, a wavelength blocker array, a plurality of egress ports, a plurality of degree drop ports, a plurality of degree add ports, and a wavelength selective cross-connect (WSX) array. The wavelength blocker array has plurality of wavelength blocking units, each wavelength blocking unit is coupled to a corresponding one of the plurality of ingress ports. The wavelength selective cross-connect (WSX) array includes a plurality of 2×2…
N-DEGREE CDC WSX ROADM
Granted: July 5, 2018
Application Number:
20180192168
An apparatus includes N 1×2 ingress tap couplers, a wavelength blocker array, N 2×1 egress tap couplers, and a wavelength selective cross-connect (WSX) array. A tapped branch of each ingress tap coupler is coupled to a degree drop and where N>1. The wavelength blocker array has N wavelength blocking units, each wavelength blocking unit coupled to a corresponding one of the N 1×2 ingress tap couplers. A tapped branch of each egress tap coupler is coupled to a degree add. The…
SWITCHABLE-GAIN OPTICAL AMPLIFIER
Granted: September 28, 2017
Application Number:
20170279243
Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for optical communications. In one aspect, an optical amplifier includes an input port, a wavelength division multiplexing fiber coupled to a pump source and to a bar-cross switch, a first gain stage optically coupled between a first port of the bar-cross switch and to an output port, the first gain stage including a first gain flattening filter, and a secondary gain stage optically coupled…
OPTICAL CIRCULATOR ARRAY
Granted: September 21, 2017
Application Number:
20170269296
Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for optical communications. In one aspect, an optical circulator array includes a plurality of stacked three port circulators each having a respective first port of a first port array, a respective second port of a second port array, and a respective third port of a third port array. Each of the plurality of staked three port circulators share optical components including a first micro lens…
EXTERNAL CAVITY FP LASER
Granted: August 17, 2017
Application Number:
20170237519
Methods, systems, and apparatus, for an external cavity FP laser. In one aspect, an apparatus is provided that includes a FP laser diode; a Faraday rotator (FR) coupled to receive an optical output of the FP laser diode and that rotates a polarization of the optical output; an optical fiber coupled at a first end to receive the output of the FR; a WDM filter coupled to a second end of the optical fiber to receive the optical signal from the optical fiber; and a FRM coupled directly or…
2x2 WAVELENGTH SELECTIVE SWITCH ARRAY
Granted: June 22, 2017
Application Number:
20170176687
Methods, systems, and apparatus for optical wavelength selective switching. One 2×2 wavelength selective switch array includes a plurality of optical input ports configured to receive one or more optical input beams, and a plurality of optical output ports configured to receive one or more one or more optical output beams wherein the plurality of optical input ports and optical output ports form an array of 2×2 optical port pairs; one or more optical conditioning and wavelength…
COMPACT WDM OPTICAL MODULES
Granted: December 29, 2016
Application Number:
20160380406
Methods, systems, and apparatus, for optical communication. One apparatus includes a Fabry-Perot (FP) laser diode assembly coupled to a first port of a circulator; an optical amplifier coupled to a second port of the circulator; a wavelength division multiplexer (WDM) filter coupled to a third port of the circulator; and a Faraday rotator mirror coupled to the WDM filter.
MEMS OPTICAL SWITCH
Granted: June 2, 2016
Application Number:
20160154183
Methods, systems, and apparatus, including computer programs encoded on computer storage media, for optical switching. One of the optical switches includes a plurality of optical fibers positioned in an array, the plurality of fibers including one or more input fibers and a plurality of output fibers; a microelectromechanical (MEMS) mirror configured to controllably reflect light from an input fiber to a particular target output fiber of the plurality of output fibers, wherein a position…
MEMS FIBER OPTICAL SWITCH
Granted: May 19, 2016
Application Number:
20160139340
Methods, systems, and apparatus, including computer programs encoded on computer storage media, for optical switching. One of the optical switches includes a plurality of optical fibers positioned in an array, the plurality of fibers including one or more input fibers and a plurality of output fibers; a microelectromechanical (MEMS) mirror configured to controllably reflect light from an input fiber to a particular target output fiber of the plurality of output fibers, wherein a position…
SECURITY SYSTEM ACCESS DETECTION
Granted: October 1, 2015
Application Number:
20150279198
Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for access and control of networked devices. In one aspect, a method includes receiving a request for access to a security system device; determining whether the device is set to a first mode or a second mode; and in response to determining that the device is in the second mode, generating one or more notifications to authorized users identifying the access to the security device.
2x2 Wavelength Selective Switch Array
Granted: July 30, 2015
Application Number:
20150212275
Methods, systems, and apparatus for optical wavelength selective switching. One 2×2 wavelength selective switch array includes a plurality of optical input ports configured to receive one or more optical input beams, and a plurality of optical output ports configured to receive one or more one or more optical output beams wherein the plurality of optical input ports and optical output ports form an array of 2×2 optical port pairs; one or more optical conditioning and wavelength…
Switchable-Gain Optical Amplifier
Granted: June 25, 2015
Application Number:
20150180196
Methods, systems, and apparatus, including computer programs encoded on computer storage media, for optical communications. One optical amplifier includes an input port; a bar-cross switch optically coupled to the input port; a first gain stage optically coupled between first port of the bar-cross switch and to an output port; and a secondary gain stage optically coupled between a second port and a third port of the bar-cross switch, wherein in a bar-state of the bar-cross switch the…
SECURITY SYSTEM DEVICE POWER MANAGEMENT
Granted: May 14, 2015
Application Number:
20150131500
Methods, systems, and apparatus are provided for power management. The methods include detecting a triggering event at a sensor device of a security system; activating a wireless transmitter/receiver from a low power mode; detecting a broadcast beacon frame from an access point device; transmitting a probe request frame that includes triggering event data; and returning the wireless transmitter/receiver to a low power mode.
TUNABLE OPTICAL FILTER
Granted: December 11, 2014
Application Number:
20140362442
Methods, systems, and apparatus for optical fiber communications. One tunable optical filter includes a light inputting assembly and a light receiving assembly; an adjustable cavity length assembly arranged between the light inputting assembly and the light receiving assembly, wherein the adjustable cavity length assembly includes an adjustable length device, a first substrate, and a second substrate, wherein the first substrate and the second substrate are positioned parallel to each…
CONFIGURING SECURE WIRELESS NETWORKS
Granted: September 18, 2014
Application Number:
20140281478
Methods, systems, and apparatus, including computer programs encoded on computer storage media, for configuring secure wireless networks. One of the methods includes receiving, at a security system management device, protocol and key information for establishing a connection as a client device to the wireless IP device, wherein the protocol and key information is received in response to a user transmitting an identifier for the IP device to a service provider system; establishing…
INTERFACES FOR SECURITY SYSTEM CONTROL
Granted: September 18, 2014
Application Number:
20140281990
Methods, systems, and apparatus, including computer programs encoded on computer storage media, for controlling security systems. One of the methods includes receiving, at a mobile device, an input to present camera video content; presenting, in a user interface, a first array of video content, wherein the respective video content is associated with a first security system location; receiving a user input to present a second array of video content, wherein the respective video content is…
