Patent application number | Description | Published |
20090039453 | SEMICONDUCTOR LIGHT RECEIVING DEVICE - The present invention provides a semiconductor light receiving device that prevents local heat generation, has high-speed, high-sensitivity characteristics even at the time of an intensive light input, and exhibits high resistance to light inputs. The semiconductor light receiving device includes light absorption layers ( | 02-12-2009 |
20090050933 | SEMICONDUCTOR LIGHT-RECEIVING DEVICE AND METHOD FOR MANUFACTURING THE SAME - Disclosed is a semiconductor light-receiving device having high reproducibility and reliability. Also disclosed is a method for manufacturing a semiconductor light-receiving device. Specifically disclosed is a semiconductor light-receiving device | 02-26-2009 |
20090160033 | SEMICONDUCTOR OPTICAL ELEMENT - A light receiving element | 06-25-2009 |
20100019275 | SEMICONDUCTOR PHOTO DETECTOR - A semiconductor photo detector of the present invention includes a layer structure, having a selective etching layer of a first-type conductivity, a field-relaxing layer of the first-type conductivity, a multiplier layer, a field-relaxing layer of a second-type conductivity, a light absorption layer of the second-type conductivity, a selective etching layer of the second-type conductivity, a buffer layer of the second-type conductivity, a contact layer of the second-type conductivity, and an electrode in the side of the second-type conductivity, which are sequentially deposited over a semiconductor substrate, and having a second mesa formed on the semiconductor substrate and a first mesa formed on the second mesa, wherein the first mesa includes the buffer layer of the second-type conductivity, the contact layer of the second-type conductivity, and the electrode in the side of the second-type conductivity, wherein the second mesa includes the layer of the first-type conductivity, the multiplier layer, the light absorption layer of the second-type conductivity, and the selective etching layer of the second-type conductivity, wherein an outer periphery of the second mesa is located outside of the outer periphery of the first mesa in two-dimensional view, and wherein surfaces of the first mesa and the second mesa is covered by a passivation film. | 01-28-2010 |
20100279457 | METHOD FOR MANUFACTURING A SEMICONDUCTOR LIGHT-RECEIVING DEVICE - Disclosed is a method for manufacturing a semiconductor light-receiving device having high reproducibility and reliability. Specifically disclosed is a semiconductor light-receiving device | 11-04-2010 |
20120057151 | SIGNAL LIGHT MONITORING APPARATUS AND SIGNAL LIGHT MONITORING METHOD - An optical filter performs filtering on input monitor light in a transmission range having a carrier frequency of each channel being measured as a center frequency. Photoelectric convertors convert the monitor light filtered by the optical filter into an electrical monitor signal, and the signal detection unit judges whether signal light is present or absent based on the electrical monitor signal. Since the optical filter performs filtering, an S/N ratio of the monitor light becomes great and the signal detection unit can more accurately judge whether signal light is present or absent even in an optically noisy environment. | 03-08-2012 |
20130077969 | OPTICAL COMMUNICATION APPARATUS, OPTICAL COMMUNICATION SYSTEM, AND PATH CONTROL METHOD - An optical communication apparatus of a wavelength division multiplexing transmission system has a transponder having a double-wavelength tunable transceiver and a transceiver including a switching controller, and a ROADM device having a device that copes with a colorless function and a directionless function and can operate in cooperation with the transponder. | 03-28-2013 |
20150180583 | WAVELENGTH DIVISION MULTIPLEXING OPTICAL TRANSMISSION DEVICE - [Problem] In relation to optical communication of a wavelength-division multiplex method, provided is an an optical transmission device capable of performing transmission of an optical signal wherein the influence of waveform distortion or the like generated when the optical signal passes through a device or the like on a transmission line is suppressed, and deterioration of waveform is accordingly small. | 06-25-2015 |