Oe Solutions America, Inc.

Oe Solutions Co., Ltd.

Optoelectronics Solutions Co., Ltd.

Industry-University Cooperation Foundation Hanyang University

Cendori Co., Ltd.

Moon Soo Park

Wanseok Seo

Jong Ho Kim

Kwang Soo Park

Soonwon Hong

Joon Sang Yu

Ji-Young Lee

Jan A W Venema

Wan Seok Seo

Tae Young Jeon

Bong Sin Kwark

Christian Hoede

Jun-Young Park

Tae-Yeoul Yun

Bongsin Kwark

Jiwon Jang

Daejin Kim

A method and apparatus for matching different impedance of optical components and a package for optical communication using a tapered transmission line (or a taper) are provided. The taper may be configured to include a first section, a second section, and a third section, each of which corresponds to different components. By way of example, the first section of the taper may be configured to be allocated to a driver to a flex joint on a printed circuit board (PCB), the second section of the taper may be configured to be allocated to a flex circuit, and the third section of the taper may be configured to be allocated to a transistor outline (TO) and submount including a directly modulated laser (DML). The taper is configured to minimize an amount of impedance mismatch between the optical components and the package.

Method and apparatus for matching impedance of optical components using a tapered transmission line

An optical transceiver including a submount, a Mach-Zehnder Modulator (MZM), bonding wires, and a low pass filter type matching network is provided. The MZM includes an input port and an output port and disposed on the submount. The bonding wires are coupled to the submount and the MZM. The low pass filter type matching network is coupled to the bonding wires and is configured to absorb inductance of the bonding wires at a high frequency.

Method and apparatus for mitigating adverse effects of bonding wire of external optical modulators

An air-conditioning device has a dust removing function, including: an outdoor air introducing portion for introducing outdoor air into a case; an outdoor air discharge portion having a blowing fan for supplying the indoor environment with the outdoor air introduced through the outdoor air introducing portion; an indoor air introducing portion for introducing indoor air; and an indoor air discharge portion having a blowing fan for discharging the indoor air introduced through the indoor air introducing portion into the outdoor environment, wherein the air-conditioning device includes: a filter coupled inside the entrance of the outdoor air introducing portion to be able to collect dust that is introduced together with outdoor air; and an opening formed through the lower end of the edge portion of the filter.

Air-conditioning device having dust removing function

A method and apparatus for compensating optical dispersion over an optical fiber are provided in fiber optic communications to increase a transmission distance by overcoming the optical dispersion caused by wavelength changes of light sources and dispersion effects of a fiber. In one implementation, the present technology may be implemented in the form of a RLC passive microwave filter with no extra power consumption. By way of example, an optical receiver may include a photodiode operable to receive an optical signal and produce an electrical signal, a transimpedance amplifier (TIA) operable to receive the electrical signal and produce a first amplified signal, and an electronic dispersion compensation (EDC) device operable to receive the first amplifier signal from the TIA and compensate or reduce the effects of optical dispersion on the received electrical signal.

Electronic dispersion compensation methods and implementations using RLC filter synthesis

Methods and apparatuses for optical communications are provided. By way of example, an optical transceiver includes a processing device coupled to a memory, an optical subassembly, and a programmable device. The optical subassembly is configured to receive and modulate a first signal carrying high speed user data for transmission to a remote device over an optical link. The programmable device is coupled to the processing device and configured to receive data relating to digital diagnostic monitoring information (DDMI) of the optical transceiver from the processing device, perform forward error correction encoding on the DDMI data to produce a remote digital diagnostic monitoring (RDDM) signal, and send the RDDM signal to the optical subassembly as a second signal to modulate for transmission. The optical subassembly is configured to current modulate the second signal on the first signal to produce a double modulated optical signal for transmission to the remote device.

Enhanced transmission and reception of remote digital diagnostic information of optical tranceivers

Disclosed is an optical transceiver. The optical transceiver includes a decoder for decoding an 8B10B line-coded signal, a data mapper for separating the decoded signal into block units and securing extra memory capacity by mapping a data code and a block information code onto each of the separated blocks, and an FEC encoding unit for creating Forward Error Correction (FEC) data and mapping the FEC data onto the extra memory capacity.

Optical transceiver and data mapping method using thereof

A high-speed optical receiver implemented using a low-speed light receiving element is provided, which is configured to receive an optical signal having a higher transmission rate than that received using a general avalanche photo diode (APD) by expanding a frequency bandwidth using a receiver circuit configured together with an APD in the optical receiver including the APD, an APD bias control circuit, a transimpedance amplifier (TIA) for amplifying a signal received from the APD to have low noise, and a post amplifier; and a method of implementing such a high-speed optical receiver.

High-speed optical receiver implemented using low-speed light receiving element and method for implementing the same

Enhanced transmission and reception of remote digital diagnostic information of optical transceivers

Disclosed is an optical transceiver which includes an optical transmitter converting a first electrical signal into a first optical signal, an optical receiver converting a second optical signal into a second electrical signal, and a processing unit operatively coupled to the optical transmitter and the optical receiver. The processing unit is configured to obtain first wavelength information of the first optical signal and second wavelength information of the second optical signal and compare the first wavelength information and the second wavelength information to control a wavelength separation interval between the first optical signal and the second optical signal.

Optical transceiver and optical communication system

Disclosed is an optical transceiver. The optical transceiver includes a decoder for decoding an 8B10B line-coded signal; a data mapper for separating the decoded signal into block units and securing extra memory capacity by mapping a data code and a block information code onto each of the separated blocks; and an FEC encoding unit for creating a Forward Error Correction (FEC) data and mapping the FEC data onto the extra memory capacity.

A scheme is described for remote control of the wavelength of a tunable transmitter in a smart small form-factor pluggable (SFP) transceiver, a smart SFP plus (SFP+) transceiver, a smart 10 gigabit small form-factor pluggable (XFP) transceiver, a smart duplex transceiver, a smart bidirectional (BiDi) transceiver, or a smart single wavelength single fiber (SWSF) BiDi-transceiver in a communication system using an operating system with Operation, Administration, and Maintenance (OAM) and Proprietary Protocol (PP) functions; an OAM, PP & Payload Processor; a transceiver; an optical spectrum analyzer; a bit error rate test (BERT); and an optical link in the field.

Scheme for remote control of the wavelength of a tunable transmitter in a smart transceiver

Disclosed is an optical communication receiver capable of compensating a DC offset while preventing an input load effect. The optical communication receiver includes an optical signal detector; an amplifier inputted with a photocurrent outputted from the optical signal detector; and a DC offset compensation unit provided therein with a third transistor and a fifth transistor which are connected in series to each other to prevent an input load effect, wherein the DC offset compensation unit compensates a DC offset by outputting at least a portion of DC current inputted to the amplifier to ground through the third transistor and the fifth transistor when the photocurrent is an over current more than a predetermined set value.

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Irvine, CA, United States of America

Moon Soo Park