Abstract:
An example optical polarization controller can include a substantially planar substrate and a waveguide unit cell formed on the substantially planar substrate. The waveguide unit cell can include a first out-of-plane waveguide portion and a second out-of-plane waveguide portion coupled to the first out-of-plane waveguide portion. Each of the first and second out-of-plane waveguide portions can respectively include a core material layer arranged between a first optical cladding layer having a first stress-response property and a second optical cladding layer having a second stress-response property. The first and second stress-response properties can be different such that each of the first and second out-of-plane waveguide portions is deflected by a deflection angle.
Abstract:
The present invention is based on a two-dimensional photonic crystal in which are inserted, in a controlled manner, defects that originate the waveguides and the resonant cavity that integrate the device. Its main function is to provide the control of the passage of an electromagnetic signal over a communications channel, blocking (state off) or allowing (state on) the passage of the signal. It also has the function of changing the propagation direction of an electromagnetic signal by an angle of 60 degrees, offering greater flexibility in the design of integrated optical systems. The operating principle of the device is associated with the excitation of dipole modes in the resonant cavity, which is based on a magneto-optical material. When the switch is under the influence of an external DC magnetic field H0, a rotating dipole mode excited in the cavity allows the passage of the input signal to the output (state on), whereas without the application of H0, a stationary dipole mode excited in the cavity, with the nodes aligned to the output waveguide, prevents the passage of the input signal to the output (state off).
Abstract:
A plasmonic device and an apparatus and method for generating a surface plasmon polariton (SPP) mode using the plasmonic device are disclosed herein. The plasmonic device includes a first plasmonic waveguide and a second plasmonic waveguide. The first plasmonic waveguide is made of a strip-shaped metal material forming at least one pair of first metal-dielectric interfaces along with a dielectric layer, and extends from an input location to a gap start location. The second plasmonic waveguide is made of a strip-shaped metal material forming at least one pair of second metal-dielectric interfaces in planes identical to those of the at least one pair of first metal-dielectric interfaces of the first plasmonic waveguide, and extends from a gap end location, spaced apart from the gap start location by the length of a gap along the propagation direction of the SPP, to an SPP output location.
Abstract:
Systems and methods are presented for modulating a beam of radiation, such that the modulated beam exhibits substantially null residual amplitude modulation (RAM). An electro-optical modulator is presented that includes a waveguide, a first region associated with the waveguide and a second region associated with the waveguide. The waveguide is designed to guide a beam of radiation. A first electric potential applied to the first region causes a first modulation to the beam of radiation while a second electric potential applied to the second region causes a second modulation to the beam of radiation. The first modulation combined with the second modulation provides substantially null residual amplitude modulation of the beam of radiation.
Abstract:
An optical device, comprising: a waveguide substrate in which two waveguides are formed along a waveguide plane, and a first emission light beam and a second emission light beam which are emitted from the two waveguides in parallel with each other; and a condensing member including a first condensing element which emits the first emission light beam after collimation, and a second condensing element which emits the second emission light beam after collimation, the first condensing element and the second condensing element being formed in an element installation surface with a constant interval, wherein when an angle made by an emission end surface of the waveguide substrate in the waveguide plane and a waveguide direction that is an extension direction of the waveguide is set as θ, a relationship of 0°
Abstract:
Methods and systems for a low-parasitic silicon high-speed phase modulator are disclosed and may include fabricating an optical phase modulator that comprises a PN junction waveguide formed in a silicon layer, wherein the silicon layer may be on an oxide layer and the oxide layer may be on a silicon substrate. The PN junction waveguide may have p-doped and n-doped regions on opposite sides along a length of the PN junction waveguide, and portions of the p-doped and n-doped regions may be removed. Contacts may be formed on remaining portions of the p-doped and n-doped regions. Portions of the p-doped and n-doped regions may be removed symmetrically about the PN junction waveguide. Portions of the p-doped and n-doped regions may be removed in a staggered fashion along the length of the PN junction waveguide. Etch transition features may be removed along the p-doped and n-doped regions.
Abstract:
A coupler/splitter including two neighboring coplanar waveguide portions extending in a same direction, the first portion having a constant cross-section, the second portion having a variable cross-section so that the effective index of the second waveguide portion varies, in the upstream-to-downstream direction, from a first lower value to a second value higher than the effective index of the first portion, in adiabatic coupling conditions.
Abstract:
An optical waveguide device having a Mach-Zehnder type waveguide formed on a substrate is provided in which a slope of two waveguides input to an optical coupler on an output side of the Mach-Zehnder type waveguide is 0 degrees, a waveguide of the optical coupler after being coupled by the optical coupler is a multi-mode waveguide, and the waveguide which is output from the optical coupler is a three-branched waveguide including an output main waveguide and two output sub waveguides interposing the output main waveguide therebetween.
Abstract:
A semiconductor optical waveguide device includes a substrate having a first area and a second area, and first, second, and semiconductor mesas on the substrate. The first semiconductor mesa includes a cladding layer and a first mesa portion on the second area, the first mesa portion including first and second portions. The second semiconductor mesa includes an intermediate layer, a first core layer, and first and second mesa portions on the first and second area, respectively. The third semiconductor mesa includes a second core layer, and first and second mesa portions having a greater width than that of the second semiconductor mesa. The first portion of the first semiconductor mesa has a substantially the same width as the second mesa portion of the second semiconductor mesa. The first core layer is optically coupled to the second core layer through the intermediate layer disposed between the first and second core layers.
Abstract:
A base device has a first waveguide positioned on a first base. The waveguide is at least partially defined by a ridge extending away from the first base. An auxiliary optical device has a second waveguide positioned on a second base. The second optical device is immobilized on the base device such that the second waveguide is between the first base of the first optical device and the second base of the auxiliary device. The first waveguide is optically aligned with the second waveguide such that the first waveguide and second waveguides can exchange optical signals.