Abstract:
본 발명은 광통신 시스템에서 운영되는 다채널 광원 구동 장치에 있어서 광원의 구동전류에 의한 출력광의 세기를 조절하는 경우 발생하는 파장 천이를 보정하는 방법에 관한 것으로, 광통신 시스템에서 사용되는 광원의 구동전류 변화에 의한 광원의 출력파장의 천이를 보정하는 방법에 있어서, 사전에 설정된 설정 출력광세기 및 설정 출력파장에 따른 상기 광원의 초기 구동전류 및 초기 구동온도를 설정하는 제1 단계; 상기 초기 구동온도에서, 상기 광원의 구동전류와 출력파장의 상관관계를 구하고, 상기 구동전류와 출력파장의 상관관계를 이용하여 하기 수학식1 의 계수 a, b, c, d를 구하는 제2 단계; (x: 구동전류, y: 출력파장) 상기 초기 구동전류에서, 상기 광원의 구동온도와 출력파장의 상관관계를 구하고, 상기 구동온도와 출력파장의 상관관계를 이용하여 하기 수학식2 의 계수 e, f를 구하는 제3 단계; (y: 출력파장, z: 구동온도) 상기 광원의 구동전류를 재설정하는 경우, 상기 수학식 1을 통해 재설정된 구동전류에 의해 천이된 출력파장을 계산하고, 상기 초기 구동전류에 따른 설정 출력파장과 상기 천이된 출력파장의 파장차를 계산하고, 상기 초기 구동온도 및 상기 수학식 2의 계수 e를 이용하여 상기 파장차에 따른 구동온도의 재설정값을 계산하여, 천이된 출력파장을 설정 출력파장으로 보정하도록 구동온도를 재설정하는 제4 단계를 포함하는 광원의 출력파장 천이 보정 방법을 제공하는 것을 요지로 한다.
Abstract:
PURPOSE: An optical transponder having add and drop operation functions of an optical channel is provided to integrate the operation functions of add-type and drop-type optical transponders, add and drop maintenance information and monitoring information, and detect and recover an error generated in an optical transmission according to the addition of an error correction code signal. CONSTITUTION: An optical receiver(51) receives an optical signal from an external network, and converts the received optical signal into an electric signal. A demultiplexer(55) demultiplexes a data signal outputted from the optical receiver(51). A digital wrapper(59) adds maintenance information, monitoring information, and an error correction code to the signals demultiplexed through the demultiplexer(55). A multiplexer(56) receives signals from the digital wrapper(59), and multiplexes the received signals. An optical transmitter(52) receives the signal multiplexed in the multiplexer(56), converts the received signal into an optical signal, and transmits the optical signal to an optical transport network. An optical receiver(53) receives an optical signal from the optical transport network, and converts the received optical signal into an electric signal. A demultiplexer(57) demultiplexes a data signal outputted from the optical receiver(53). A digital wrapper(59) detects maintenance information and monitoring information from the signals demultiplexed through the demultiplexer(57), and corrects an error. A multiplexer(58) receives the signals from the digital wrapper(59), and multiplexes the received signals. An optical transmitter(54) receives the signal multiplexed in the multiplexer(58), converts the received signal into an optical signal, and transmits the optical signal to the external network.
Abstract:
Disclosed are an optical transceiver and an optical network system capable of performing data communication and a light path monitoring operation. The optical transceiver can simultaneously perform the data communication and light path monitoring operation; and set the frequency of an optic signal for the data communication and the frequency of an optic signal for the light path monitoring to be different.
Abstract:
PURPOSE: An optical signal controlling device, a method thereof, and an optical signal generating device are provided to optimize an optical signal of a quadrature phase shift keying mode generated by an optical modulator. CONSTITUTION: A voltage signal generator(510) generates corresponding voltage signals by using a signal obtained from a detected optical signal. A time division signal generator(520) generates time division signals. An optical signal controller(530) determines a voltage signal and a time division signal. The optical signal controller varies a phase value with combined signals for controlling an output optical signal. [Reference numerals] (510) Voltage signal generator; (520) Time division signal generator; (530) Optical signal controller; (540) Power unit; (550) Main controller
Abstract:
본 발명은 CWDM(Coarse Wavelength Division Multiplexing)이 적용되는 광송수신 시스템, 및 LAN-WDM이 적용되는 광 송수신 시스템에서 TOSA(Transmitter Optical Sub Assembly), ROSA(Receiver Optical Sub Assembly)의 패키징을 용이하게 하고, 패키징된 TOSA, ROSA 신뢰성을 향상시키며, 패키징, 및 신뢰성에 대한 재현성을 높이는 다채널 광 송신장치, 및 수신장치의 능동 정렬방법을 개시한다. CWDM, LAN-WDM, TOSA, ROSA
Abstract:
A current control apparatus for controlling the current flowing in a thermo-electric cooler, a control method thereof and an optical transceiver having the apparatus are provided to reduce the number of elements included in a circuit by simply configuring a control circuit in a hardware method. A current control apparatus(10) controls the current flowing in a thermo-electric cooler(22) installed within a laser diode module(20). A current supplying unit includes at least one transistor which is turned on/off according to a control voltage. According to on/off states of the transistor, the current supplying unit controls the direction and amount of current which is applied to the thermo-electric cooler. A controller(100) provides an input voltage, decided according to the direction and amount of current, to the current supplying unit.
Abstract:
An optical transponder for interfacing a multi protocol signal and a method therefor are provided to interface a STM-64/OC-192 signal, an OTU2 signal and a 10GbE signal. A reception clock generating unit(210) produces clocks on a receiving path. An optical transceiver(220) performs the photoelectric-conversion for an input signal and multiplexes/de-multiplexes the input signal. A controller(270) performs a control operation so as to determine the operation mode of an OTH framer(230) and SDH/SONET framer(240) according to a clock comparison signal of a clock signal comparison unit(222). If the fact that the input signal is an OTH signal is confirmed through the clock comparison signal, the controller sets the operation mode of the OTH framer to process the input signal. The controller outputs the second selection control signal for clock oscillation to process the OTH signal among the first to third frequency calibration oscillators to the second selecting unit. The second selecting unit selects a frequency calibration oscillator for performing the clock oscillation to process the OTH signal according to the second selection control signal.