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    • 2. 发明授权
    • Wavelength division multiplexing optical transmitter using Fabry-Perot laser
    • 波分复用光发射机采用法布里 - 珀罗激光器
    • US07340173B2
    • 2008-03-04
    • US10776720
    • 2004-02-11
    • Dong-Jae ShinDae-Kwang JungJea-Hyuck LeeJung-Kee LeeJeong-Seok LeeSeong-Taek HwangYun-Je Oh
    • Dong-Jae ShinDae-Kwang JungJea-Hyuck LeeJung-Kee LeeJeong-Seok LeeSeong-Taek HwangYun-Je Oh
    • H04J14/02H04J14/00
    • H04J14/02H04B10/506
    • A WDM (Wavelength Division Multiplexing) optical transmitter using a Fabry-Perot laser is disclosed. The WDM optical transmitter includes a light source for outputting incoherent light of a prescribed wavelength bandwidth, a circulator having the first to the third ports, for outputting the incoherent light received at the first port coupled to the light source to the second port, and outputting an optical signal received at the second port to the third port coupled to the external waveguide, a WGR (Waveguide Grating Router) having a multiplexing port (MP) coupled to the second port of the circulator and a plurality of demultiplexing ports (DPs), for performing WD (Wavelength Division) demultiplexing on the incoherent light received at the MP to output WD-demultiplexed signals to the plurality of DPs, and performing WD multiplexing on a plurality of channel signals received at the plurality of DPs to output WD-multiplexed signals to the MP, and a plurality of FB (Fabry-Perot) lasers respectively connected to the DPs of the WGR, each FP laser is comprised of a laser cavity, an antireflection coating layer deposited at one end of the laser cavity facing a corresponding DP, and a high reflection coating layer deposited at the other end of the laser cavity, whereby an optical injection efficiency increases and an influence of reflected light is reduced, resulting in facilitation of a wavelength-locked phenomenon.
    • 公开了一种使用法布里 - 珀罗激光器的WDM(波分复用)​​光发射机。 WDM光发射机包括用于输出规定波长带宽的非相干光的光源,具有第一至第三端口的循环器,用于将耦合到光源的第一端口处接收到的非相干光输出到第二端口,并输出 在第二端口处接收到耦合到外部波导的第三端口的光信号,具有耦合到循环器的第二端口的复用端口(MP)的WGR(波导光栅路由器)和多个解复用端口(DP) 用于对在MP处接收到的非相干光进行WD(波分)解复用,以将WD分离的信号输出到多个DP,并且对在多个DP上接收的多个信道信号执行WD复用以输出WD复用信号 MP和分别连接到WGR的DP的多个FB(Fabry-Perot)激光器,每个FP激光器由激光腔,抗雷 在激光腔的面对相应的DP的一端沉积的吸收层,以及沉积在激光腔的另一端的高反射涂层,由此光注入效率增加并且反射光的影响减小,导致促进 的波长锁定现象。
    • 4. 发明授权
    • Method for maintaining wavelength-locking of Fabry-Perot laser regardless of change of external temperature and WDM light source using the method
    • 不管外部温度和WDM光源的变化如何,使用该方法维持法布里 - 珀罗激光器的波长锁定的方法
    • US07187700B2
    • 2007-03-06
    • US10730568
    • 2003-12-08
    • Dong-Jae ShinDae-Kwang JungJea-Hyuck LeeJung-Kee LeeSeong-Taek HwangYun-Je Oh
    • Dong-Jae ShinDae-Kwang JungJea-Hyuck LeeJung-Kee LeeSeong-Taek HwangYun-Je Oh
    • H01S3/13
    • H04B10/572H01S5/4006
    • Disclosed is a method for maintaining wavelength-locking of a Fabry-Perot laser regardless of a change of external temperature even though a temperature controller is not used, and a wavelength division multiplexing (WDM) light source using the method, as an economical light source used in a WDM optical communication field. The WDM light source comprises a Fabry-Perot laser for injecting spectrum-spliced incoherent light to amplify and output only an oscillation mode matching with a wavelength of the injected light, and a bias controlling unit for adjusting a bias current supplied to the Fabry-Perot laser to a value adjacent to a threshold current of the Fabry-Perot laser, whose threshold current is changed according to a temperature and a relationship between the injected light changed depending to a temperature and a wavelength of the oscillation mode. Therefore, the bias current having a value adjacent to the threshold current of the Fabry-Perot laser is supplied to the Fabry-Perot laser, so that the Fabry-Perot laser can maintain an excellent transmission characteristic regardless of a change of temperature even though a temperature controller is not used.
    • 公开了即使不使用温度控制器也能够保持法布里 - 珀罗激光器的波长锁定的方法,而不管外部温度的变化如何,并且使用该方法作为经济光源的波分复用(WDM)光源 用于WDM光通信领域。 WDM光源包括用于注入频谱拼接的非相干光的法布里 - 珀罗激光器,以放大和仅输出与注入的光的波长匹配的振荡模式;以及偏置控制单元,用于调节提供给法布里 - 珀罗 激光到与Fabry-Perot激光器的阈值电流相邻的值,其阈值电流根据温度改变,并且注入的光随温度变化和振荡模式的波长之间的关系而改变。 因此,具有与法布里 - 珀罗激光器的阈值电流相邻的值的偏置电流被提供给法布里 - 珀罗激光器,使得法布里 - 珀罗激光器可以保持优异的传输特性,而不管温度的变化,即使 温度控制器不使用。
    • 5. 发明授权
    • Reflective semiconductor optical amplifier light source
    • 反光半导体光放大器光源
    • US07123406B2
    • 2006-10-17
    • US10867035
    • 2004-06-14
    • Dong-Jae ShinJeong-Seok LeeSeung-Woo KimSeong-Taek Hwang
    • Dong-Jae ShinJeong-Seok LeeSeung-Woo KimSeong-Taek Hwang
    • H10S5/50
    • H01S5/50H01S5/005H01S5/0064H01S5/0078H01S5/5018
    • A reflective semiconductor optical amplifier light source is disclosed. The reflective semiconductor optical amplifier light source includes a transmissive type semiconductor optical amplifier for creating and amplifying spontaneous emission light, a reflector for reflecting amplified spontaneous emission light outputted from the semiconductor optical amplifier such that amplified spontaneous emission light is reflected back into the semiconductor optical amplifier, and a bandpass filter having a predetermined wavelength band width for limiting wavelength bands of the amplified spontaneous emission light capable of passing through the bandpass filter. In one aspect of the invention, the bandpass filter is interposed between the semiconductor optical amplifier and the reflector. In another aspect, a polarization filter is imposed to limit the reflected emission light to a predetermined polarization.
    • 公开了一种反射半导体光放大器光源。 反射半导体光放大器光源包括用于产生和放大自发发射光的透射型半导体光放大器,用于反射从半导体光放大器输出的放大的自发发射光的反射器,使得放大的自发发射光被反射回到半导体光放大器 以及具有预定波长带宽的带通滤波器,用于限制能够通过带通滤波器的放大的自发发射光的波段。 在本发明的一个方面,带通滤波器插在半导体光放大器和反射器之间。 在另一方面,施加偏振滤光器以将反射的发射光限制到预定的偏振。
    • 6. 发明申请
    • Bi-directional wavelength division multiplexing system
    • 双向波分复用系统
    • US20050036787A1
    • 2005-02-17
    • US10834323
    • 2004-04-28
    • Jeong-Seok LeeDong-Jae ShinSeong-Taek Hwang
    • Jeong-Seok LeeDong-Jae ShinSeong-Taek Hwang
    • H04J14/00H04B10/00H04B10/272H04J14/02H04Q11/00
    • H04Q11/0067H04B10/2503H04J14/02H04J14/0226H04J14/0246H04J14/025H04J14/0282
    • A bi-directional WDM communication system of the type having central and local offices, and subscribers is provided. The central office includes downstream Bragg reflector lasers for generating downstream channels of different wavelengths, each channel being wavelength-locked to a corresponding incoherent light beam. The central office multiplexes the downstream channels into a downstream optical signal, demultiplexes an upstream optical signal into upstream channels of different wavelengths, and detects the upstream channels. The local office demultiplexes a downstream optical signal into downstream channels, multiplexes upstream channels of different wavelengths into an upstream optical signal, outputs it to the central office, and demultiplexes a broadband light beam into incoherent light beams of different wavelengths. Each subscriber receives the corresponding downstream channel and incoherent light beam, includes an upstream Bragg reflector laser for generating an upstream channel wavelength-locked to the received incoherent light beam, and outputs the upstream channel to the local office.
    • 提供了具有中央和本地办公室以及订户的双向WDM通信系统。 中心局包括用于产生不同波长的下行通道的下游布拉格反射器激光器,每个通道波长锁定到相应的非相干光束。 中心局将下游信道复用为下行光信号,将上行光信号解复用为不同波长的上行信道,并检测上行信道。 本地办公室将下行光信号解复用到下行信道,将不同波长的上行信道复用为上行光信号,将其输出到中心局,并将宽带光束解复用为不同波长的非相干光束。 每个用户接收相应的下游信道和非相干光束,包括用于产生波长锁定到接收的非相干光束的上行信道的上游布拉格反射器激光器,并将上行信道输出到本地局。
    • 7. 发明申请
    • Reflective semiconductor optical amplifier light source
    • 反光半导体光放大器光源
    • US20050105171A1
    • 2005-05-19
    • US10867035
    • 2004-06-14
    • Dong-Jae ShinJeong-Seok LeeSeung-Woo KimSeong-Taek Hwang
    • Dong-Jae ShinJeong-Seok LeeSeung-Woo KimSeong-Taek Hwang
    • H01S5/50H01S3/00H01S5/00
    • H01S5/50H01S5/005H01S5/0064H01S5/0078H01S5/5018
    • A reflective semiconductor optical amplifier light source is disclosed. The reflective semiconductor optical amplifier light source includes a transmissive type semiconductor optical amplifier for creating and amplifying spontaneous emission light, a reflector for reflecting amplified spontaneous emission light outputted from the semiconductor optical amplifier such that amplified spontaneous emission light is reflected back into the semiconductor optical amplifier, and a bandpass filter having a predetermined wavelength band width for limiting wavelength bands of the amplified spontaneous emission light capable of passing through the bandpass filter. In one aspect of the invention, the bandpass filter is interposed between the semiconductor optical amplifier and the reflector. In another aspect, a polarization filter is imposed to limit the reflected emission light to a predetermined polarization.
    • 公开了一种反射半导体光放大器光源。 反射半导体光放大器光源包括用于产生和放大自发发射光的透射型半导体光放大器,用于反射从半导体光放大器输出的放大的自发发射光的反射器,使得放大的自发发射光被反射回到半导体光放大器 以及具有预定波长带宽的带通滤波器,用于限制能够通过带通滤波器的放大的自发发射光的波段。 在本发明的一个方面,带通滤波器插在半导体光放大器和反射器之间。 在另一方面,施加偏振滤光器以将反射的发射光限制到预定的偏振。
    • 9. 发明授权
    • Light source apparatus for WDM optical communication and optical communication system
    • 用于WDM光通信和光通信系统的光源设备
    • US07209609B2
    • 2007-04-24
    • US11144949
    • 2005-06-03
    • Dong-Jae ShinSeong-Taek HwangDae-Kwang Jung
    • Dong-Jae ShinSeong-Taek HwangDae-Kwang Jung
    • G02B6/26H04J14/02
    • H04B10/506H04J14/02
    • A light source apparatus for use with optical communication using external-injection light sources, and an optical communication system using the light source apparatus. The light source apparatus for optical communication includes external-injection light sources, and a multiplexer/demultiplexer. The multiplexer/demultiplexer provides light components spectrum-sliced broadband light from a broadband light source as respective external injection light inputs. The multiplexer/demultiplexer includes a first waveguide to transmit the broadband light and multiplexed light with a plurality of wavelengths, a plurality of second waveguides each to transmit light with an associated one of the wavelengths, and a plurality of optical filters each to pass light with an associated one of the wavelengths and to reflect the remaining wavelengths. The pass wavelength of each optical filter is set such that insertion loss distribution of the optical filters at the wavelengths is similar to a gain distribution of the injection light sources at the wavelengths.
    • 一种用于使用外部注入光源的光通信的光源装置和使用该光源装置的光通信系统。 用于光通信的光源装置包括外部注入光源和多路复用器/解复用器。 多路复用器/解复用器提供来自宽带光源的光分量光谱切片宽带光作为相应的外部注入光输入。 多路复用器/解复用器包括:第一波导,用于传输宽带光和具有多个波长的多路复用光;多个第二波导,每个用于透射具有相关联的一个波长的光;以及多个光学滤光器, 相关联的一个波长并反射剩余的波长。 设置每个滤光器的通过波长,使得波长处的滤光器的插入损耗分布类似于在波长处的注入光源的增益分布。
    • 10. 发明申请
    • Method for removing cross-talk in wavelength division multiplexed passive optical network
    • 消除波分复用无源光网络串扰的方法
    • US20060171629A1
    • 2006-08-03
    • US11341727
    • 2006-01-27
    • Dong-Jae ShinChang-Sup ShimSeong-Taek HwangDae-Kwang Jung
    • Dong-Jae ShinChang-Sup ShimSeong-Taek HwangDae-Kwang Jung
    • G02B6/28
    • H04J14/0226H04B10/85H04J14/0246H04J14/025H04J14/028H04J14/0283H04J2014/0253
    • Disclosed is a method for removing cross-talk in a wavelength division multiplexed passive optical network (WDM-PON). The WDM-PON and the method remove cross-talk between adjacent wavelength channels due to incomplete alignment of wavelength channels in a MUX/de-MUX between a central office and a remote node in the WDM-PON employing light-injected light sources. The WDM-PON includes at least two broadband light sources having different bands, which provide injection light to be injected to light-injected channels light sources, a transmitter receiving injection from the broadband light sources, injecting the injection light to odd channel light-injected light sources and even channel light-injected light sources, arraying odd and even channels in such a manner that the odd and even channels belong to different spectrum bands, multiplexing the signal according channels, and transmitting the multiplexed signal. The WDM-PON may also include a receiver for receiving the multiplexed signal transmitted from the transmitter and splitting the multiplexed signal according to the odd and even channels.
    • 公开了一种在波分复用无源光网络(WDM-PON)中消除串扰的方法。 由于使用光注入光源的WDM-PON中的中心局和远程节点之间的MUX /解除MUX中的波长信道不完全对准,WDM-PON和该方法消除了相邻波长信道之间的串扰。 WDM-PON包括至少两个具有不同频带的宽带光源,其提供要注入到光注入通道光源的注入光,从宽带光源接收注入的发射器,将注入光注射到注入光的奇数通道 光源甚至通道光注入光源,以奇数和偶数信道属于不同频谱带的方式排列奇数和偶数信道,根据信道复用信号,并发送多路复用信号。 WDM-PON还可以包括用于接收从发射机发送的复用信号的接收机,并根据奇数和偶数信道分离多路复用信号。