公开(公告)号：WO1995030164A1

公开(公告)日：1995-11-09

申请号：PCT/US1995005365

申请日：1995-04-25

Applicant: UNIVERSITY OF CINCINNATI

Inventor： UNIVERSITY OF CINCINNATI ,  KOH, Seungug ,  CARTER, Harold, W. ,  BOYD, Joseph, T.

IPC: G02B06/43

CPC classification number: G02B6/12007 ,  G02B6/29323 ,  G02B6/2938 ,  G02B6/4215 ,  G02B6/43 ,  G06F1/105

Abstract: An optical waveguide H-tree design is provided for global clock distribution of multichip modules (MCM) which has nearly zero clock skew and is useful for a distributed computer system environment. The optical waveguide H-tree design utilizes channel waveguides (24), curved sections and directional couplers (34) formed using silica glass and silicon oxynitride (SiON) channel waveguide technologies. A hybrid combination of both SiON and silica glass is disclosed which has the advantages of each. The achievable clock speed is limited by the laser diode source and photodiode receiver at each chip module, and not by the optical waveguide distribution network. The high-speed optical waveguide can be configured to transmit clock signals, or for use a multi-wavelength communication network that communicates signals to various integrated circuits (ICs) mounted on the multichip module. This is achieved using multiple laser diodes (121) having different output wavelengths and directing their outputs into an optical multiplexer. At the receiving points on the ICs, optical demultiplexers filter the optical signals into individual output signals. In addition, multiple "stacked" optical waveguides can be constructed on the MCM to transmit multiple optical signals, and such optical signals can be either of single wavelength or multiple wavelength type.

Abstract translation: 提供了一种光波导H树设计，用于具有几乎零时钟偏移的多芯片模块（MCM）的全局时钟分配，并且对于分布式计算机系统环境是有用的。 光波导H树设计利用了使用石英玻璃和氮氧化硅（SiON）通道波导技术形成的通道波导（24），弯曲部分和定向耦合器（34）。 公开了SiON和石英玻璃的混合组合，其具有各自的优点。 可实现的时钟速度受到每个芯片模块处的激光二极管源和光电二极管接收器的限制，而不受光波导分配网络的限制。 高速光波导可以被配置为传输时钟信号，或者用于使用将信号传送到安装在多芯片模块上的各种集成电路（IC）的多波长通信网络。 这是使用具有不同输出波长的多个激光二极管（121）并将其输出引导到光复用器中来实现的。 在IC上的接收点，光解复用器将光信号滤波为各个输出信号。 此外，可以在MCM上构造多个“堆叠”光波导以传输多个光信号，并且这样的光信号可以是单波长或多波长类型。