摘要:
A method and circuit is disclosed wherein two waveguides coupled to an optical resonant ring resonator are further coupled such that beams propagating therein interfere with one another to provide a desired output response. In one embodiment, multiplexed channels of light can be demultiplexed by the device described heretofore, or alternatively, the phase relationship between these two beams can be altered prior to their being combined to provide, for example, a linearized output response useful in applications such as wavelength locking. By varying the reflectivity of the FSR and the coupling ratios and/or by varying the phase relationship between the two beams, a variety of desired output responses can be realized. By providing suitable coupling ratios and providing optical path lengths of the two waveguides which are identical between the ring resonator and the couplers coupling the two waveguides as well as having the couplers placed 180 degrees opposite to each other, an interleaver/de-interleaver function is realized.
摘要:
A method and apparatus for optical wavelength routing separates even and odd optical channels from an input WDM signal. The input beam is first converted to at least one pair of orthogonally-polarized beams. A split-mirror resonator has a front mirror with two regions having different reflectivities, and a reflective back mirror spaced a predetermined distance behind the front mirror. Each of the orthogonally-polarized beams is incident on a corresponding region of the front mirror of the split-mirror resonator. A portion of each beam is reflected by the front mirror, while the remainder of each beam enters the resonator cavity where it is reflected by the back mirror back through the front mirror. The group delay of each reflected beam is strongly dependent on wavelength. The two reflected beams from the resonator are combined and interfere in a birefringent element (e.g., a beam displacer or waveplates) to produce a beam having mixed polarization as a function of wavelength. The polarized components of this beam are separated by a polarization-dependent routing element (e.g., a polarized beamsplitter) to produce two output beams containing complementary subsets of the input optical spectrum (e.g., even optical channels are routed to output port A and odd optical channels are routed to output port B).
摘要:
An interleaver and a deinterleaver for filtering optical signals are described. The interleaver separates subsets of channels. The deinterleavers mix subsets of channels. Interleavers and deinterleavers can be used to increase the bandwidth of an optical network. The interleavers and deinterleavers can be used to interface components designed for a first channel spacing to components designed for a second channel spacing.
摘要:
A nonlinear interferometer wavelength separation mechanism for use in a dense wavelength division multiplexer is provided. The mechanism includes a first glass plate optically coupled to a second glass plate, forming a space therebetween; a mechanism for introducing a phase shift at least one channel of an optical signal; and a mechanism for broadening a pass band of the optical signal. The nonlinear interferometer of the present invention allows a dense wavelength division multiplexer to have an ease in alignment and a higher tolerance to drifts due to the increase in the width of the pass band. It also has the added ability of being passively stable to temperature.
摘要:
Methods and systems for partial integration of wavelength division multiplexing and bi-directional solutions are disclosed and may include, an optical transceiver on a silicon photonics integrated circuit coupled to a planar lightwave circuit (PLC). The silicon photonics integrated circuit may include a first modulator and first light source that operates at a first wavelength and a second modulator and second light source that operates at a second wavelength. The transceiver and PLC are operable to modulate a first continuous wave (CW) optical signal from the first light source utilizing the first modulator and modulate a second CW optical signal from the second light source utilizing the second modulator. The modulated signals may be communicated from the modulators to the PLC utilizing a first pair of grating couplers in the IC and combined in the PLC.
摘要:
An optical data center network system including multiple tier-1 optical switches, multiple tier-2 optical switches and multiple tier-3 optical switches is provided. A pod is formed by the tier-1 optical switches connected to each other through ribbon fibers. A macro pod is formed by the tier-2 optical switches connected to each other through ribbon fibers, and each of the tier-2 optical switches is connected to all of the tier-1 optical switches in one pod. The tier-3 optical switches are connected to each other through ribbon fibers, and each of the tier-3 optical switches is connected to all of the tier-2 optical switches in one macro pod. Each optical switch in each tier is implemented by using the Wavelength Selective Switch (WSS) as a basic element, which has been commercialized numerously.
摘要:
Methods and systems for partial integration of wavelength division multiplexing and bi-directional solutions are disclosed and may include, an optical transceiver on a silicon photonics integrated circuit coupled to a planar lightwave circuit (PLC). The silicon photonics integrated circuit may include a first modulator and first light source that operates at a first wavelength and a second modulator and second light source that operates at a second wavelength. The transceiver and PLC are operable to modulate a first continuous wave (CW) optical signal from the first light source utilizing the first modulator driven by a first electrical signal and modulate a second CW optical signal from the second light source utilizing the second modulator driven by a second electrical signal. The modulated signals may be communicated from the modulators to the PLC utilizing a first pair of grating couplers in the IC and combined in the PLC.
摘要:
The present invention relates to a wavelength division multiplexing optical receiver and eliminates excess loss of one polarization component while eliminating the need for a polarization-independent operation of a light receiver. An input waveguide, made of a silicon wire waveguide, is connected to a loop waveguide equipped with a polarization rotator over a polarization beam splitter. A ring waveguide equipped with an output waveguide configuring an add-drop ring resonator array is optically connected to the loop waveguide. The output light from ports at both sides of the output waveguide is incident onto first and second light-receiving surfaces of alight receiver such that the optical distances are equal to each other.
摘要:
Disclosed in one example embodiment is a method for fabricating a reinforced multi-body optical device. One method involves applying a coating to sides of an interior plate and bonding two plates to either side of the interior plate. The bonded plates are diced at an angle that is not orthogonal to the bonded plates. The top and bottom portions of a diced section are removed to form a multi-body polarization beam splitter (PBS) having a generally rectangular perimeter. A supporting plate is bonded to the multi-body PBS to form a reinforced multi-body PBS, wherein the supporting plate has a CTE that is within about 0.5 parts per million of the CTE of the multi-body PBS. The multi-body PBS is grinded to reduce the thickness of the multi-body PBS.
摘要:
Reinforced multi-body optical devices. In one example embodiment, a method for fabricating a reinforced multi-body optical device includes various acts. First, a supporting plate is bonded, using pressure and heat, to a multi-body optical device to form a reinforced multi-body optical device. The supporting plate has a coefficient of thermal expansion (CTE) that is within about 0.5 parts per million of the CTE of the multi-body optical device. Then, the multi-body optical device is ground to reduce the thickness of the multi-body optical device.