Oplink Communications Patent Grants

2×2 wavelength selective switch array

Granted: March 7, 2017
Patent Number: 9588299
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…

Athermal arrayed waveguide grating wavelength division multiplexer

Granted: December 13, 2016
Patent Number: 9519103
Athermal arrayed waveguide grating wavelength division multiplexers applicable to a relatively wide temperature range. One athermal arrayed waveguide grating wavelength division multiplexer includes a base board including an arrayed waveguide grating chip, wherein the base board and the arrayed waveguide grating chip are divided into a first portion and a second portion through at least one division plane; and a sliding deflection component positioned on the base board including a first…

Twin multicast switch

Granted: November 15, 2016
Patent Number: 9497519
Methods, systems, and apparatus, including computer programs encoded on computer storage media, for optical switching. An optical switch device includes a first multicast switch unit; and a second multicast switch unit, wherein each of the first and second multicast switch units respectively include: multiple optical input ports; multiple optical switches; multiple optical splitters/combiners; and multiple optical output ports.

Compact WDM optical modules

Granted: September 13, 2016
Patent Number: 9444218
Methods, systems, and apparatus, for optical communication. One optical assembly includes a Fabry-Perot (FP) laser diode; a first polarization controller (PC) coupled to the FP laser diode; a circulator having four ports, a first port coupled to the first PC; an optical fiber coupled at a first end to a second port of the circulator; a second PC coupled to a third port of the circulator; an optical amplifier coupled to the second PC and a fourth port of the circulator; a wavelength…

Configuring secure wireless networks

Granted: September 1, 2015
Patent Number: 9125049
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…

Wavelength division multiplexing

Granted: June 16, 2015
Patent Number: 9057841
Technologies relating to wavelength division multiplexing are provided. In one implementation, a wavelength division multiplexing (WDM) coupler is provided. The WDM coupler includes an input block including a first tube, the first tube holding an input dual fiber pigtailed capillary, the capillary holding an input fiber and a reflection fiber, a center block including a center tube holding a first inner tube and a second inner tube, the first inner tube holding a first lens within the…

Optical amplifier

Granted: May 26, 2015
Patent Number: 9042007
Methods, systems, and apparatus for optical communications. In one aspect, an optical amplifier includes a feed-forward first amplification stage including a rare-earth doped fiber receiving an optical signal and an injected pump light; and a plurality of subsequent amplification stages each including a corresponding rare-earth doped fiber, wherein each of the subsequent amplification stages receives a separately injected portion of the remnant pump light from the first amplification…

Security system power management

Granted: December 9, 2014
Patent Number: 8907807
Methods, systems, and apparatus, including computer programs encoded on computer storage media, for power management. One of the methods includes determining that there is a loss in electricity to a security system management device; entering low power state; receiving a wireless sensor alert while in the low power state; in response to the alert: returning to normal power state to transmit an alarm to a service provider system, and returning to low power state after transmitting the…

Wavelength selective switch

Granted: October 21, 2014
Patent Number: 8867016
Methods, systems, and apparatus, for optical switching. In one aspect, a wavelength selective switch includes one or more optical input ports; one or more optical output ports; a first optical wavelength dispersion element configured to separate the plurality of wavelength channels of the input optical beam; a second optical wavelength dispersion element configured to combine two or more separate optical beams each having one or more different wavelengths, into a combined beam having the…

Optical amplifier and control method for constant output power

Granted: August 27, 2013
Patent Number: 8520300
This specification describes technologies relating to controlling optical amplifiers. In one implementation, an optical amplifier is provided. The optical amplifier includes a light amplifying medium for receiving an input optical signal and outputting an output amplified signal; a first measuring block for measuring a change in power of the input signal; a pump laser for supplying pump light to the light amplifying medium; and an electronic control for controlling the power of the pump…

Optical amplifier output control based on change in detected input power

Granted: March 13, 2012
Patent Number: 8134776
This specification describes technologies relating to controlling optical amplifiers. In one implementation, an optical amplifier is provided. The optical amplifier includes a light amplifying medium for receiving an input optical signal and outputting an output amplified signal; a first measuring block for measuring a change in power of the input signal; a pump laser for supplying pump light to the light amplifying medium; and an electronic control for controlling the power of the pump…

Method for detecting a signal on a passive optical network

Granted: February 28, 2012
Patent Number: 8126334
A transceiver assembly is provided for use in an optical telecommunications network. The circuitry arrangement in the transceiver of the present invention generates a ranging signal that is transmitted along the fibers attached thereto and then filters the return signal in an manner that eliminates virtually all of the noise effects found on the fiber to provide a highly reliable timing signal for an accurate delay calculation. A band pass filter is supplied in line before the input…

Variable gain erbium doped fiber amplifier

Granted: March 22, 2011
Patent Number: 7911684
Systems, methods, and apparatuses are provided for variable gain optical fiber amplifiers. In one implementation, a variable gain optical amplifier is provided. The amplifier includes a first erbium doped fiber configured to receive an input optical signal, a second erbium doped fiber configured to output an output optical signal, a gain flattening filter positioned between the first erbium doped fiber and the second erbium doped fiber, a pump laser configured to provide energy to the…

Configurations and methods for manufacturing optical devices using an athermal platform

Granted: March 2, 2010
Patent Number: 7672551
The present invention discloses an improved optical device having at least a first and second optical components. The optical device further includes a first extending tube securely attached to the first and second optical components as a first building block wherein the first and second optical components are aligned and position adjusted in the position-holding-and-fixing means and securely attached thereto by a room-temperature UV curable epoxy UV cured at room temperature. The…

Carrier-suppressed optical time domain multiplexing

Granted: August 11, 2009
Patent Number: 7574139
A method and an apparatus for implementing carrier suppressed data format on conventional OTDM modules is provided. Adaptive phase shifting of optical signals traversing one of the tributaries of an OTDM module is performed with feedback loop control. A tapped portion of the input carrier signal is phase modulated at a frequency fc, and is combined with a tapped portion of the output from the OTDM. A phase shifter controller fed with this combined signal photodetects and band-pass…

Integrated optical dual amplifier

Granted: December 2, 2008
Patent Number: 7460298
An apparatus is provided comprising a dual optical amplifier. The two optical amplifiers are integrated, in that they share at a set of optical, electrical, or opto-electrical components. The two optical amplifiers may share a pump laser. Alternatively, the optical amplifiers may share photo-detectors. Methods of controlling the signal strength of output signals are also provided. A chip-based integrated optical dual amplifier, using Erbium-Doped Waveguides, is also provided.

Adaptive optical transponder

Granted: May 13, 2008
Patent Number: 7373087
Systems and methods for optical communications. In one implementation, a communications device is provided. The communications device includes an Optical domain Adaptive Dispersion Compensation Module (OADCM); an Electrical domain Adaptive Distortion Compensation Module (EADCM); and a controller coupled to, and operable to selectively control, both the OADCM and the EADCM.

Integrated optical multiplexer and demultiplexer

Granted: May 15, 2007
Patent Number: 7218451
Optical multiplexers and demultiplexers are provided. In one implementation an apparatus is provided. The apparatus includes a first laser diode pair, a second laser diode pair, a polarization rotator coupled between the first and the second laser diode pairs, and an output port. The first and second laser diode pairs include a first laser diode, a polarization beam splitter, a first quarter waveplate, a filter; a second quarter waveplate, and a second laser diode. The first and second…

3-port optical add-drop multiplexer (OADM)

Granted: February 27, 2007
Patent Number: 7184620
A low cost compact 3-port single-channel OADM with improved optical isolation is provided in which the I/O fibers and add/drop fiber are arranged on the same side. The 3-port OADM includes a 3-fiber pigtail and an angled reflector that together eliminate the second fiber collimator—one set of lenses and ferrules. The reflector is positioned behind and at angle to the free-space filter such that the add/drop optical signals are reflected back through the collimating lens to the…

Ultra broadband inductor assembly

Granted: November 28, 2006
Patent Number: 7142086
Systems and apparatuses for providing a broadband inductor assembly. One broadband inductor assembly includes a conical coil inductor having a broad end with radius r1 and a narrow end with radius r2, the conical coil inductor also having a broad end terminal and a narrow end terminal. The broadband inductor assembly includes a base. The broadband inductor assembly includes at least one support, such that the conical coil inductor is supported by the at least one support above the base…