SECURITY SYSTEM POWER MANAGEMENT
Granted: September 18, 2014
Application Number:
20140266767
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…
Twin Multicast Switch
Granted: September 18, 2014
Application Number:
20140270760
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.
SELF-CONFIGURING WIRELESS NETWORK
Granted: September 4, 2014
Application Number:
20140247941
Methods, systems, and apparatus, are provided for wireless networking. In some implementations, a self-configuring wireless system includes one or more wireless network devices; and an access point device, wherein the one or more wireless network devices are each preconfigured with a respective key, and wherein the access point device is configured to obtain the respective keys so as to enable the access point device to establish a secure wireless network with the one or more network…
REDUNDANT CONTROL OF SELF-CONFIGURING WIRELESS NETWORK
Granted: July 24, 2014
Application Number:
20140204727
Methods, systems, and apparatus, are provided for wireless networking. In some implementations, a self-configuring wireless system includes one or more wireless network devices; a primary access point device; and a secondary access point device; wherein the primary access point device and the at least one wireless network device are preconfigured with a respective key so as to enable the primary access point device to establish a secure wireless network with the at least one network…
MAGNETO-OPTIC SWITCH
Granted: May 22, 2014
Application Number:
20140139918
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: January 16, 2014
Application Number:
20140016199
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…
WAVELENGTH SELECTIVE SWITCH
Granted: September 12, 2013
Application Number:
20130235283
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…
FIBER NETWORK MONITORING
Granted: October 22, 2009
Application Number:
20090263123
This specification describes technologies relating to optical fiber network monitoring. A monitoring system is provided. The monitoring system includes a fiber network including a plurality of branch fibers and a main station coupled to a main fiber of the fiber network to broadcast communications signals to a plurality of branch stations. The monitoring system includes a monitoring device configured to transmit a monitoring signal and detect reflected portions of the monitoring signal…
METHOD FOR DETECTING A SIGNAL ON A PASSIVE OPTICAL NETWORK
Granted: June 4, 2009
Application Number:
20090142067
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…
Multi-port circulator
Granted: November 4, 2004
Application Number:
20040218846
An extendable four-port circulator includes a middle birefringent crystal, a first birefringent crystal, a first non-reciprocal device, a second birefringent crystal, and a second non-reciprocal device. The first non-reciprocal device is coupled to the first birefringent crystal. The second non-reciprocal device is coupled to the second birefringent crystal. The middle birefringent crystal includes a first surface, a second surface, a third surface, and a fourth surface. The first…
Loop optical circulator
Granted: January 9, 2003
Application Number:
20030007244
This invention discloses a four-port loop optical circulator. The circulator includes a first, a second, a third and a fourth optical ports for receiving optical beam therein. The circulator further includes a plurality of optical components for guiding a beam received from the first port to project from the second port, for guiding a beam received from the second port to project from the third port. The optical components are further used for guiding a beam received from the third port…
Leak detector for sealed optical devices
Granted: October 3, 2002
Application Number:
20020142469
This invention discloses a method for detecting a leak from a sealed optical device. The method includes steps of: A) injecting a target gas with no performance interference to the sealed optical device for leak detection followed by sealing the sealed optical device. B) placing the sealed device in a leak testing chamber and measuring a background level of the target gas in the leak testing chamber. C) heating the sealed device to a gas-expelling temperature for expelling the target gas…
Precision dispensing apparatus and method for manufacturing thin-film optical assembly
Granted: May 23, 2002
Application Number:
20020060862
This invention discloses a machine for automatically attaching an optical filter to a lens. The machine includes lens table for supporting the lens. The machine further includes an attachment-medium dispenser system for dispensing a plurality of gapped-dots of an attachment-medium on a top surface of the lens along a peripheral line substantially according to a bottom-surface shape of the filter. The machine further includes a surface-mounting system for mounting the optical filter onto…
