Abstract:
The present invention relates to a multi-channel receiver optical sub assembly, including: a multi-channel PD array in which a number of photo diodes (PD) which are arranged on a first capacitor and include a receiver part arranged on the center and an anode electrode pad arranged in an opposite direction of 180° between PDs adjacent to the receiver part are monolithic-integrated; a number of transimpedance amplifiers (TIA) which are arranged on a number of second capacitors, and are connected to the anode electrode pad of each PD through wire bonding; a sub mount in which the first capacitor, the second capacitors and a number of transmisson lines are embedded; and a transistor outline (TO) comprising a plurality of pins including a power pin to supply a power source voltage to the multiple PDs and the multiple TIAs through the multiple transmission lines, a ground pin to supply a ground voltage to the multiple TIAs and an output pin to output a signal of the multiple TIAs. The sub mount is embedded in the TO.
Abstract:
PURPOSE: An optical module for a multichannel transmitter is provided to reduce crosstalk and to be integrated into a small size. CONSTITUTION: A plurality of optical source parts (110a-110d) generates light. A plurality of electro absorption modulators (EAMs) (120a-120d) converts the light to an optical signal through a high frequency signal. A plurality of high frequency transmission paths (142a-142d) applies the high frequency signals to the EAMs. A combiner (130) integrates the converted optical signals. The high frequency transmission paths are connected to the EAMs by a TW electrode method. [Reference numerals] (110a) First light source; (110b) Second light source; (110c) Third light source; (110d) Fourth light source; (120a) First EAM; (120b) Second EAM; (120c) Third EAM; (120d) Fourth EAM; (130) Combiner
Abstract:
PURPOSE: An optical module for transmission is provided to include an extended high-frequency modulation bandwidth. CONSTITUTION: An EML(Electro-absorption Modulated Laser)(110) modulates light into an optical signal through a high-frequency signal. A first sub-mount(120) transmits the high-frequency signal to the EML. A second sub-mount(130) receives the high-frequency signal from the EML. The second sub-mount terminates the EML. The length of the first wire and the length of the second wire are different from each other. [Reference numerals] (111) Light source
Abstract:
PURPOSE: An optical communication device including an optical switch is provided to change a path of an optical signal by including a transmission output unit and a reflection output unit. CONSTITUTION: A main core(105) comprises a light input unit and a light transmission output unit. The light input unit and the light transmission output unit are formed on a substrate and are extended and successively arranged along the first direction. A heater is extended along a second direction and crosses the main core. A light reflection output unit(107) is extended along a third direction from the center of the main core. A first angle between the first and second directions is equal to a second angle between the second and third directions.
Abstract:
A wavelength selection switch is provided to perform mass production and low cost with high reliability. A wavelength selection switch includes an optical demultiplexing part(110), an optical deflection part, and an optical multiplexing part(120). The optical demultiplexing part divides input optical signals into wavelength corresponding to each channel. The optical demultiplexing part selects and outputs the optical signal divided from the input optical signals about each channel or an optical signal inputted through an additional port. The optical deflection part individually deflects the optical signal of each channel received from the optical demultiplexing part according to current supply or voltage supply. The optical multiplexing part outputs the optical signal of each channel to a specific output port according to deflection of the optical deflection part.
Abstract:
A polarization insensitivity slab waveguide is provided to increase the reliability and performance of optical device by making a waveguide insensitive to material for the waveguide and a structure variable. In a polarization insensitivity slab waveguide, a light is projected from a waveguide area is reflected or diffracted at a diffraction grating and it is compensated. The waveguide area is composed of a first bottom cladding layer, a first core, and a top cladding layer. A polarized light compensation region comprises the bottom-clad layer, the first core layer, the top clad layer, and the second core layer.
Abstract:
본 발명은 파장분할 다중화 및 역 다중화 장치를 이용한 파장 분할 다중 방식의 수동형 광 가입자 망에 관한 것으로서, 파장 분할 다중 방식의 광 가입자 망을 경제적으로 구성하기 위하여 기지국 측에서의 광 송신기용 광원을 저가격으로 구성하는 방법을 제공한다. 이를 위하여 본 발명에서는 송신용 광원을 고차 주기 격자(Higher Order Grating)를 이용한 외부 공진기 레이저(External Cavity Laser; ECL)로 구성하여 다수개의 파장을 갖는 광원을 구성하고 이를 직접 변조하는 방식으로 다수 파장 채널에 대한 광 송신이 가능한 저가격의 광 송신 모듈을 제작하는 방법을 제시한다. 파장분할, 광 가입자 망, 광 송신기, 고차 격자 , 외부 공진기, 레이저, WDM, PON, ECL