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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Tian; Cechan
Address:
Plano, TX
No. of patents:
32
Patents:












Patent Number Title Of Patent Date Issued
8218975 Free-space DQPSK demodulator July 10, 2012
A demodulator comprises an input splitter, optical device sets, and couplers. The input splitter splits an input signal comprising symbols to yield a number of signals. A first optical device set directs a signal of along a first path. A second optical device set directs another signal
7970278 Flexible open ring optical network and method June 28, 2011
A flexible open ring optical network includes a plurality of nodes connected by twin or other suitable optical rings. Each node is operable to passively add and passively drop traffic from the rings. The nodes may include a transport element for each ring. The transport elements include
7957644 Flexible open ring optical network and method June 7, 2011
A flexible open ring optical network includes a plurality of nodes connected by twin or other suitable optical rings. Each node is operable to passively add and passively drop traffic from the rings. The nodes may include a transport element for each ring. The transport elements include
7912378 Modulating a signal using a fractional phase modulator March 22, 2011
A system operable to modulate a signal according to phase-shift keying (PSK) modulation includes one or more phase modulators that comprise one or more fractional phase modulators. A fractional phase modulator includes a splitter that splits a communication signal to yield a first co
7860402 Modulating a signal according to 2.sup.n-PSK modulation December 28, 2010
A system operable to modulate a signal according to phase-shift keying (PSK) modulation includes a translator and a phase modulation system. The translator receives data signals and translates the data signals into control signals, where the number of control signals is greater than the
7826743 Optical ring network for extended broadcasting November 2, 2010
An optical network includes an access ring, a local ring, one or more add/drop nodes (ADNs), a first gateway and a second gateway. The access ring couples the plurality of gateways and transmits optical signals to and from the gateways, the optical signals comprising multiple wavelen
7801393 Monitoring modulator bias using photon absorption September 21, 2010
Monitoring a bias point of an optical modulator includes receiving an optical signal modulated by the optical modulator. Photons of the optical signal are received at a photon reactive material operable to produce a reaction in response to the arrival of a predetermined number of photons
7668466 Free space demodulator for demodulating a signal February 23, 2010
A demodulator comprises an input splitter, optical device sets, and couplers. The input splitter splits an input signal comprising symbols to yield a number of signals. A first optical device set directs a signal of along a first path. A second optical device set directs another signal
7664391 Method and system for shared optical regeneration February 16, 2010
An optical network includes an optical ring that is capable of transmitting, between two or more nodes, a plurality of working traffic streams that include traffic transmitted in one of a plurality of wavelengths. A node is capable of transmitting, in a first wavelength, a first prot
7653124 Monitoring differential phase-shifted keying demodulation January 26, 2010
Monitoring a demodulator includes repeating the following for each demodulating module of one or more demodulating modules of a demodulator: receiving a first signal and a second signal from a demodulating module; introducing a relative delay between the first signal and the second s
7650083 Demodulating a signal by performing consecutive beam splitting January 19, 2010
A demodulator includes one or more modules operable to receive an input signal comprising symbols. A module receives a main signal comprising at least a portion of the input signal and splits the main signal to yield a branching signal and a remaining main signal. The branching signal
7650076 Dynamic blocking of token-controlled data transmissions in communication networks January 19, 2010
A method for token-controlled data transmission includes receiving a token including transmission data specifying one of a plurality of data channels and a time window. A burst blocker is configured, based at least in part on the transmission data, for the selective communication of the
7603035 Method and system for a data centric architecture in an optical network October 13, 2009
A method and system for a data centric architecture in an optical network are provided. In one embodiment, a method and system for a data centric architecture in an optical network includes an optical ring. A number of local nodes are coupled to the optical ring and are configured to rec
7539360 Monitoring modulator bias using photon absorption May 26, 2009
Monitoring a bias point of an optical modulator includes receiving an optical signal modulated by the optical modulator. Photons of the optical signal are received at a photon reactive material operable to produce a reaction in response to the arrival of a predetermined number of photons
7466877 Monitoring modulation alignment variation using photon absorption December 16, 2008
Monitoring modulation alignment variation of optical modulators includes receiving an optical signal at an input fiber. The optical signal has been modulated by optical modulators. Photons of the optical signal are received at a photon reactive material operable to produce a reaction in
7400440 Method and system for determining gain for an optical signal July 15, 2008
A method for determining gain for an optical signal includes measuring a first power level that is an output power level of an optical signal at a first optical node, communicating the optical signal to a second optical node, and communicating the first power level to the second optical
7379235 Reducing polarization dependence of a wavelength dispersion variation monitor May 27, 2008
Reducing polarization dependence of a dispersion variation monitor includes receiving an optical signal. The optical signal is split into a first polarized signal having first photons and a second polarized signal having second photons. The first photons are received at a first material
7369765 Optical network with selective mode switching May 6, 2008
A method for communicating optical traffic in a network comprising a plurality of network nodes includes receiving traffic to be added to the network at a network node. The network is operable to communicate received traffic in an optical signal comprising one or more channels. The m
7305184 Method and system for management of directly connected optical components December 4, 2007
A method for management of directly connected optical components includes receiving a source optical signal for communication to an optical network. The source optical signal comprises one or more source channels. The method includes monitoring optical traffic communicated on the opt
7283750 System and method for setting a tunable filter in an optical network October 16, 2007
A method and a system for setting a tunable filter in an optical network are provided. In one embodiment, a method for setting a tunable filter in an optical network includes rejecting a reference wavelength using a fixed filter from an input optical signal to generate a passthrough
7254292 Directing optical channels using a reflective device August 7, 2007
A device for directing one or more optical channels includes one or more micromirror elements. A micromirror element has a mirror and a mirror controller. The mirror is operable to reflect light at a first interaction area to yield a first passband for an optical channel, and to refl
7231148 Flexible open ring optical network and method June 12, 2007
A flexible open ring optical network includes a plurality of nodes connected by twin or other suitable optical rings. Each node is operable to passively add and passively drop traffic from the rings. The nodes may include a transport element for each ring. The transport elements include
7120360 System and method for protecting traffic in a hubbed optical ring network October 10, 2006
An optical access network includes a first ring and a second ring communicating optical signals in opposite directions. The network also includes an access node coupled to both rings that adds traffic in a first wavelength of a first optical signal communicated on the first ring. Fur
7116905 Method and system for control signaling in an open ring optical network October 3, 2006
A method and system for control signaling in an open ring optical network includes transmitting traffic in an optical ring. At each of a plurality of nodes along the ring, local traffic is passively added to and passively dropped from the connected ring. At each node, an ingress opti
7085496 Passive add/drop amplifier for optical networks and method August 1, 2006
An add/drop node for an optical network comprises a passive splitter to split an ingress signal from the network into a first ingress signal and a second ingress signal. A first amplified splitter stages module is operable to passively split and amplify the first ingress signal into a
7076163 Method and system for testing during operation of an open ring optical network July 11, 2006
The method and system for testing during operation of an open ring network includes opening a ring of the network at the node. Traffic circulating on the ring is dropped in the node to a monitoring element prior to or at the opening of the ring in the node. At the monitoring element, a s
7075712 Combining and distributing amplifiers for optical network and method July 11, 2006
A system for distributing optical signals comprises a plurality of optical splitter stages. The optical splitter stages are each operable to passively split each of one or more optical signals provided to the stage into a plurality of optical signals. At least one of the optional spl
7057149 Method and system for controlling a secondary amplifier with a primary amplifier in an optical n June 6, 2006
A method for controlling an amplifier in an optical network includes determining primary pump power information for a primary amplifier and communicating the primary pump power information to a secondary amplifier coupled to the primary amplifier. The method also includes generating
7027210 Method and system for determining gain for an optical signal April 11, 2006
A method for determining gain for an optical signal includes measuring a first power level that is an output power level of an optical signal at a first optical node, communicating the optical signal to a second optical node, and communicating the first power level to the second optical
7009761 Power tilt compensation using automatic power balance control March 7, 2006
A method for correcting power tilt in an optical signal includes tapping off a representative portion of an optical signal and separating the representative portion into a first signal and a second signal. The first signal includes a first wavelength band and the second signal includes a
7006282 Control system and method for an optical amplifier February 28, 2006
A method and system for controlling the gain of the amplification of an optical signal is provided that includes both electrical feedforward and feedback. In a feedforward portion of an optical amplifier, the method includes receiving an optical signal and measuring an input power. Based
6690508 Control system and method for an optical amplifier February 10, 2004
A method and system for controlling the gain of the amplification of an optical signal is provided that includes both electrical feedforward and feedback. In a feedforward portion of an optical amplifier, the method includes receiving an optical signal and measuring an input power. Based










 
 
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