Abstract: A photonic III-V semiconductor device comprises at least one distributed feedback (DFB) laser diode having a laser active region, and at least one semiconductor optical amplifier (SOA) having an amplifier active region. The III-V semiconductor device comprises a III-V semiconductor heterostructure formed on a III-V semiconductor substrate, the III-V semiconductor heterostructure comprising an active layer structure between a lower cladding layer and an upper cladding layer; the active layer structure forming the laser active region and the amplifier active region. The device has an optical interface edge. The at least one DFB laser diode comprises an optical output facet, and the at least one SOA comprises an optical input facet. The at least one DFB laser diode and the at least one SOA are positioned in parallel with the output facet and the input facet lying on the optical interface edge.

Abstract: According to an embodiment, an optical transmitter comprises: a laser configured to provide an optical signal to an optical output based on a control current; a control unit electrically coupled to the laser and configured to modulate the laser using the control current, wherein the control current comprises a direct current component and a temporally varying modulation component configured to cause a temporal variation of a wavelength of at least one spectral line in the optical signal; a semiconductor optical amplifier comprising an optical input and an optical output, wherein the semiconductor optical amplifier is configured to receive the optical signal from the optical output of the laser, amplify the optical signal while operating in a saturation mode, and provide the amplified optical signal to an optical output of the semiconductor optical amplifier; and an optical fiber interface optically coupled to the optical output of the semiconductor optical amplifier.

Abstract: According to an embodiment, a semiconductor optical amplifier comprises: an optical input; an optical output; a waveguide optically coupled to the optical input and to the optical output, wherein the waveguide comprises at least two bent sections; and a plurality of semiconductor layers epitaxially deposited on a substrate, wherein the waveguide is positioned on top of the plurality of semiconductor layers and the plurality of semiconductor layers comprises an active region configured to amplify an optical signal propagating in the at least one waveguide.

Abstract: A Photonic Integrated Circuit (PIC), which efficiently combines the functionalities of light emission, coupling and modulation. In the PIC design, light-emitting, modulation and coupling structures are grown such that each of the structures has at least one common underlying non-conductive layer and at least two common SC layers provided on the common underlying non-conductive layer(s). The coupling structure couples light from the light-emitting structure to the modulation structure. The modulation structure comprises one or more optical waveguides (e.g., slot waveguides) each partly implemented in the common SC layers and comprising a waveguide core embedded in a waveguide cladding. The waveguide core comprises at least two waveguide elements spaced apart from each other by an (e.g., organic or inorganic) electro-optic material having a variable refractive index. The waveguide elements are configured to provide electro-optic modulation of the light in response to a drive voltage applied across them.

Abstract: An apparatus for optical demultiplexing comprising an optical splitter, at least two semiconductor optical elements (SOE's), and an optical gating line arrangement optically coupled to each of the at least two SOE's for altering optical transmission properties of the corresponding SOE.

Abstract: An apparatus for optical demultiplexing comprising an optical splitter, at least two semiconductor optical elements (SOE's), and an optical gating line arrangement optically coupled to each of the at least two SOE's for altering optical transmission properties of the corresponding SOE.

Abstract: An optical coupling element is configured to be positioned between and optically couple a first optical component configured to transmit a light beam, and a second optical component configured to receive light. The optical coupling element comprises a glass coupler body having a receiving side surface and an opposite transmitting side surface. The glass coupler body comprises a converging member configured to reduce divergence of light entering the glass coupler body via the receiving side surface; and a coupling waveguide extending within the glass coupler body between the converging member and an output facet on the transmitting side surface and being configured to transmit light from the converging member to the output facet.

Abstract: An optical coupling element is configured to be positioned between and optically couple a first optical component configured to transmit a light beam, and a second optical component configured to receive light. The optical coupling element comprises a glass coupler body having a receiving side surface and an opposite transmitting side surface. The glass coupler body comprises a converging member configured to reduce divergence of light entering the glass coupler body via the receiving side surface; and a coupling waveguide extending within the glass coupler body between the converging member and an output facet on the transmitting side surface and being configured to transmit light from the converging member to the output facet.