External cavity FP laser
Granted: June 26, 2018
Patent Number:
10009136
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…
Magneto-optic switch
Granted: June 26, 2018
Patent Number:
10007130
Systems, methods, and apparatus for optical switching. In some implementations, a magneto-optic switch includes multiple optical components positioned in order along a light path including: a single fiber optical collimator, a first birefringent optic crystal, a first half wave plate assembly, a polarization rotation assembly, a second half wave plate assembly, a second birefringent optic crystal, and a dual fiber optic collimator, wherein a first side of the polarization rotation…
Optical depolarizer
Granted: June 26, 2018
Patent Number:
10007041
Methods, systems, and apparatus, for optical depolarization. One optical depolarizer includes a light-combining module comprising a birefringent prism, wherein an optic axis of a first crystal of the birefringent prism forms a 90° angle with an optic axis of a second crystal of the birefringent prism; and a depolarization module, wherein the depolarization module is disposed at a light emitting end of the light-combining module, the depolarization module comprising a light splitting…
Athermal Faraday rotator mirror
Granted: March 27, 2018
Patent Number:
9927639
Methods, systems, and apparatus for optical communications are provided. One of the apparatus includes a first Faraday rotator having an applied magnetic field in a first direction; a second Faraday rotator optically coupled to the first Faraday rotator, the second Faraday rotator having an applied magnetic field in a second direction in opposition to the first direction; and a mirror optically coupled to the second Faraday rotator.
2×2 wavelength selective switch array
Granted: March 27, 2018
Patent Number:
9927577
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…
Optical circulator array
Granted: October 24, 2017
Patent Number:
9798081
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…
Compact WDM optical modules
Granted: September 19, 2017
Patent Number:
9768586
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.
Optical fiber ribbon retractor
Granted: July 18, 2017
Patent Number:
9709767
Methods, systems, and apparatus for optical communications. One of the apparatuses includes a spool comprising a spool wheel, one or more separate spool portions positioned on the spool wheel, and one or more bearings positioned on the spool wheel, wherein the one or more spool portions and the one or more bearings are configured such that an optical fiber ribbon can be wound through the spool; and a spring coupled to the spool wheel such that the spring provides a rotational force on…
Faraday rotator mirror
Granted: July 11, 2017
Patent Number:
9703124
Methods, systems, and apparatus for optical communications. One of the apparatuses comprises a birefringent crystal configured to separate an incoming light beam input at a first port into component light beams having orthogonal polarization directions and directing the component light beams on respective paths to exit locations on the birefringent crystal; and a Faraday rotator positioned between the birefringent crystal and a beam folding optic assembly, wherein the Faraday rotator is…
Optical circulator array
Granted: July 4, 2017
Patent Number:
9696485
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, wherein each of the plurality of stacked three port circulators share optical components including: a first…
Switchable-gain optical amplifier
Granted: June 13, 2017
Patent Number:
9680283
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…
External cavity fabry-perot laser
Granted: May 2, 2017
Patent Number:
9640943
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…
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…
