Abstract:
An integrated transmitting-receiving circuit (transceiver) designed as two complementary types for an optical duplex system with two light waves with different operating wavelengths to be transmitted in opposite directions via an optical fibre has a wavelength-independent optical switch designed as a Y structure formed of waveguide paths. The first path of the switch is designed as a connecting waveguide between the optical fibre and the two other paths, the second path leads to the transmission laser designed according to the complementary type for the corresponding operating wavelength, and the third path leads to a photodetector system with two photodetector sections optically connected in series, designed each for one of the two operating wavelengths and electrically independent of one another. The photodetector section designed for the shorter operating wavelength is arranged between the switch and the photodetector section designed for the longer operating wavelength.
Abstract:
A display type image sensor using thin-film photoelectric conversion elements that function as light emitting elements and light receiving elements so that the sensor can be used both as an active matrix display and as an image sensor, wherein pixels (PX) arranged in matrix each comprise: a first pixel portion (PXA) having a first conduction control circuit (SWA) supplied with a scan signal through a scan line (gate) and a first thin-film photoelectric conversion element (11A) which can emit and receive light and connects to a first interconnect (D21) and a second interconnect (D22) through the first conduction control circuit (SWA); and a second pixel portion (PXB) having a second conduction control circuit (SWB) supplied with a scan signal through the same scan line (gate) and a second thin-film photoelectric conversion element (11B) which can emit and receive light and connects to the first interconnect (D21) and a third interconnect (D23) through the second conduction control circuit (SWB).
Abstract:
An opto-isolator (10) increases optical efficiency by using holographic elements (22, 24, 26) to direct a beam of light (34) through an optical waveguide (20). An opto-electronic transmitter (12) and receiver (16) are connected to the waveguide to be in alignment with the beam of light reflected by the holographic elements. The transmitter and receiver are disposed on separate leadframe portions (14, 18), and the opto-isolator is surrounded by a package (32).
Abstract:
PC770785WO 14 ABSTRACT A sensing system comprising: an emitter configured to emit light; a detector configured to detect light; and a metallic substrate configured to support the emitter and the detector, wherein the metallic substrate includes a metallic barrier located between the emitter and the detector configured to reduce a transmission of light from the emitter to the detector. [Fig.4]