Abstract: An optical network system, including multiple nodes, an optical switch, and a switch controller, is configured to achieve communication in the optical domain. Each node is configured to receive both high frequency and low frequency inputs, generally utilized for handling data and addressing information, respectively. The two types of information are combined to create an amplitude modulated optical signal. Subsequently, the two types of information are separated by examining the optical power average of the signal being transmitted. Using one portion of the signal for addressing information, the switch controller can perform necessary routing and arbitration functions. Appropriate communications can then be sent back to the nodes and the optical switch to achieve the necessary configuration. The protocol utilized allows for subsequent arbitration and data transmission cycles, allowing the system and switch controller to configure transmission paths and arbitrate any communication issues.

Abstract: The present disclosure is directed to an optical apparatus suitable for coupling to an optical network. The optical apparatus is adapted to transmit multiplexed optical signals on the optical network and/or de-multiplex optical transmissions from the network. The optical apparatus includes an optical waveguide and an optoelectronic device. The optical waveguide has a set of diffractive elements in the form of a scribed volume hologram, which provides an optical transfer function. The optical waveguide also includes a first optical port and a second optical port. The second optical port is adapted to be optically coupled to the optical network. The optoelectronic device includes a plurality of optical portions. The optoelectronic device is adapted to convert optical signals at the optical portions into electric signals and/or convert electric signals into optical signals at the optical portions.

Abstract: An integrated photonic apparatus that includes a glass substrate having a major surface, a first waveguide segment and a second waveguide segment, and a folded evanescent coupler connecting the first waveguide segment to the second. The folded evanescent coupler is formed by a first length of the first waveguide segment and an equivalent length portion of the second waveguide running parallel and adjacent to the first waveguide segment. The first length is substantially equal to one half of an evanescent-coupler length needed to transfer a first wavelength in a non-folded evanescent coupler. A reflector (e.g., dielectric mirror that is highly reflective to light of the first wavelength and also highly transmissive to light of a second wavelength) is located at an end of the folded evanescent coupler. The first length is selected to transfer substantially all light of a first wavelength.

Abstract: An integrated photonic apparatus that includes a glass substrate having a major surface, a first waveguide segment and a second waveguide segment, and a folded evanescent coupler connecting the first waveguide segment to the second. The folded evanescent coupler is formed by a first length of the first waveguide segment and an equivalent length portion of the second waveguide running parallel and adjacent to the first waveguide segment. The first length is substantially equal to one half of an evanescent-coupler length needed to transfer a first wavelength in a non-folded evanescent coupler. A reflector (e.g., dielectric mirror that is highly reflective to light of the first wavelength and also highly transmissive to light of a second wavelength) is located at an end of the folded evanescent coupler. The first length is selected to transfer substantially all light of a first wavelength.

Abstract: An integrated photonic apparatus that includes a glass substrate having a major surface, a first waveguide segment and a second waveguide segment, and a optical tap or port that extracts a portion of the light from the first waveguide segment into the second waveguide segment, and emits that light from a surface of the substrate. In some embodiments, a wavelength-selective evanescent coupler and/or a wavelength-selective optical diffraction grating perform a selection of one or more wavelengths to exit from the port.