公开(公告)号：US06438148B1

公开(公告)日：2002-08-20

申请号：US09405119

申请日：1999-09-27

Applicant: Rongqing R. Hui ,  Jin J. Hong ,  Maurice S. O'Sullivan

Inventor： Rongqing R. Hui ,  Jin J. Hong ,  Maurice S. O'Sullivan

IPC: H01S310

CPC classification number: H01S5/1228 ,  H01S5/0057 ,  H01S5/0265 ,  H01S5/0623 ,  H01S5/06258 ,  H01S5/1021 ,  H01S5/1215

Abstract: A device for encoding data into high speed optical train includes N data encoding branches, each having a dual-mode laser, generating at the beat frequency f, and an external modulator. Each dual mode laser includes a laser structure having two sections formed on the same substrate which simultaneously operate at different longitudinal modes. Each section has a complex coupled (gain-coupled or loss-coupled) grating which is formed by deep etching through the multi-quantum well structure, ensuring no substantial interaction between lasers. The sections have common active medium and shared optical path and provide mutual light injection into each other. Signals from the branches are put through a variable delay line, introducing phase shifts between the signals, and compressed in the optical compressor. Thus, N short pulse optical trains are formed. The phase shifts between the signals are adjusted so that, when the trains are further combined in the optical combiner, they interleave in a precise timing to form one combined optical pulse train of frequency Nf. Thus, encoding of data at a speed, which is much higher than the speed of the external modulator, is achieved. The corresponding method of encoding data is also provided.

Abstract translation: 用于将数据编码成高速光学列车的装置包括N个数据编码分支，每个分支具有以拍频f产生的双模激光器和外部调制器。 每个双模激光器包括具有形成在同一基板上的两个部分的激光结构，其同时在不同的纵向模式下操作。 每个部分具有通过深度蚀刻穿过多量子阱结构形成的复合耦合（增益耦合或损耗耦合）光栅，确保激光器之间没有实质的相互作用。 这些部分具有共同的有源介质和共享光路，并且彼此相互注入。 来自分支的信号通过可变延迟线，引入信号之间的相移并在光学压缩器中压缩。 因此，形成N个短脉冲光学列车。 调整信号之间的相移，使得当光组合器中的列进一步组合时，它们在精确的定时交织以形成频率为Nf的一个组合光脉冲串。 因此，以比外部调制器的速度高得多的速度对数据进行编码。 还提供了相应的编码数据的方法。

公开(公告)号：US06519270B1

公开(公告)日：2003-02-11

申请号：US09409036

申请日：1999-09-29

Applicant: Hyung B. Kim ,  Jin J. Hong

Inventor： Hyung B. Kim ,  Jin J. Hong

IPC: H01S310

CPC classification number: H01S5/06258 ,  H01S5/1021 ,  H01S5/1228

Abstract: The invention relates to compound cavity optical reflection modulation laser system providing frequency modulation of laser light by phase induced effective reflection modulation of the laser rear facet. The system includes a single mode gain coupled DFB laser integrated with a passive waveguide section to form a compound cavity modulation system. The waveguide includes a multiple quantum well region which is reverse biased to utilize the quantum Stark effect for voltage controlled refractive index modulation, thus providing phase modulation of the laser light. The phase modulated light is fed back to the laser to interfere with the light generated within the laser and to form the output light generated from the compound cavity. The interference effects cause modulation of the effective complex reflection of the rear laser facet which results in frequency modulation of the output light. If required, the frequency modulated light (FM) may be converted into intensity modulated (IM) light by using an additional narrow band optical filter, e.g. Mach-Zehnder interferometer.

Abstract translation: 本发明涉及通过激光后面的相位诱导有效反射调制来提供激光的频率调制的复合腔光反射调制激光系统。 该系统包括与无源波导部分集成的单模增益耦合DFB激光器，以形成复合腔调制系统。 波导包括多量子阱区域，其被反向偏置以利用用于压控折射率调制的量子斯塔克效应，从而提供激光的相位调制。 相位调制光被反馈到激光器以干扰在激光器内产生的光并形成从复合腔产生的输出光。 干扰效应导致后激光小面的有效复反射的调制，这导致输出光的频率调制。 如果需要，调频光（FM）可以通过使用附加的窄带滤光器（例如， 马赫 - 曾德干涉仪。