Abstract:
A telecommunications module includes a main housing portion and a cover, the main housing portion defining a first sidewall, a front wall, a rear wall, a top wall, and a bottom wall, the cover defining a second sidewall when mounted on the main housing portion. An optical component located within the module receives an input signal from a signal input location of the housing and outputs an output signal toward a signal output location on the front wall. The telecommunications module is configured such that the signal input location can be selected to be either on the front wall or the rear wall of the main housing. The cover defines a protrusion extending from the second sidewall toward the main housing portion, the protrusion being selectively breakable to expose a recess on the front wall of the main housing portion that defines a signal input location.
Abstract:
A reversible optical circulator and a coupling device constructed therefrom. The optical circulator includes first and second non-reciprocal optical elements having magnetic field generators for generating magnetic fields that determine the rotation of the polarization vector of light signals passing therethrough. The non-reciprocal optical elements rotate the polarization of the light signals by either 90 degrees or 0 degrees depending on the direction of the magnetic field associated with that non-reciprocal element. The reversible circulator (312) can be combined with wavelength selective reflectors (330,332) to form a light coupling device (360) that adds a first light signal having a wavelength of λ 1 to a second light signal of wavelength λ 2 traveling in an optical channel (304). The direction of the added light signal in the optical channel (304) is controlled by the direction of the magnetic field in the optical circulator (312) and the choice of which selective reflector (330,332) is active.
Abstract:
A resonator (300), e.g., a silica microsphere or disk, is used between two fiber optic cables (500, 502) to form an add/drop filter. The resonator (300) is resonant with the frequency to be added or dropped. In this way, only that particular channel is added or dropped as needed.
Abstract:
A channel dropping filter includes three frequency routing devices (30,31,32), one which functions as an input device (30) and two which function as output devices (31,32). The first frequency routing device has one input (16) for receiving the input signal and at least N outputs, where N corresponds to the number of frequencies that compose the input signal. The N outputs of the first frequency routing device are each coupled to an optical switch (21). Each optical switch has a first output coupled in consecutive order to one of the N inputs (16₁,...16 N ) of the first output frequency routing device (31) and a second output coupled in consecutive order to one of the N inputs (16₁,...16 N ) of the second output frequency routing device (32). A controller is employed to selectively switch the optical switches between first and second states for directing each optical frequency component demultiplexed by the first frequency routing device to the first and second output frequency routing device, respectively.
Abstract:
An MEMS optical switch (200) and a switching node (300) are disclosed. The MEMS optical switch (200) includes N 1 input ports (210), N 1 input MEMS mirrors (220), M 1 output ports (240), and M 1 output MEMS mirrors (230), where a first input port (210) is configured to transmit a first optical signal to a first input MEMS mirror (220); and the first input MEMS mirror (220) is configured to reflect the first optical signal to a first destination output MEMS mirror, where along a straight line in which a first deflection axis is located, the first input MEMS mirror (220) is located on an edge of the N 1 input MEMS mirrors (220), and when reflecting the received first optical signal to a first output MEMS mirror (231) and a second output MEMS mirror (232), the first input MEMS mirror (220) deflects towards an opposite direction relative to a second deflection axis. The MEMS optical switch improves rotation angle utilization of a MEMS mirror without changing a maximum rotation angle of the MEMS mirror.
Abstract:
An MEMS optical switch (200) and a switching node (300) are disclosed. The MEMS optical switch (200) includes N 1 input ports (210), N 1 input MEMS mirrors (220), M 1 output ports (240), and M 1 output MEMS mirrors (230), where a first input port (210) is configured to transmit a first optical signal to a first input MEMS mirror (220); and the first input MEMS mirror (220) is configured to reflect the first optical signal to a first destination output MEMS mirror, where along a straight line in which a first deflection axis is located, the first input MEMS mirror (220) is located on an edge of the N 1 input MEMS mirrors (220), and when reflecting the received first optical signal to a first output MEMS mirror (231) and a second output MEMS mirror (232), the first input MEMS mirror (220) deflects towards an opposite direction relative to a second deflection axis. The MEMS optical switch improves rotation angle utilization of a MEMS mirror without changing a maximum rotation angle of the MEMS mirror.
Abstract:
A resonator (300), e.g., a silica microsphere or disk, is used between two fiber optic cables (500, 502) to form an add/drop filter. The resonator (300) is resonant with the frequency to be added or dropped. In this way, only that particular channel is added or dropped as needed.
Abstract:
The optical mixing-demixing is effected, as regards the mixing operation, by suitably sending two light beams having different wavelengths to a first separation surface between transparent materials having suitable behaviours of the refractive index. The obtained multiple beam, with a third beam having a different wavelength is then sent to a second separation surface between transparent materials having different suitable behaviours of the refractive index, obtaining an only beam; the operation is repeated till all the beams are mixed. For demixing operation, the beam formed by a plurality of beams, having different wavelengths is suitably sent to a first separation surface between transparent materials having suitable behaviours of the refractive index and an only monochromatic beam is drown out. The resulting beam is then sent to a second separation surface between transparent materials having different suitable behaviours of the refractive index, for drawing out a second monochromatic beam; the operation is repeated until all the beams are demixed.