Method to control temperature of LD
    4.
    发明授权
    Method to control temperature of LD 有权
    控制LD温度的方法

    公开(公告)号:US08611761B2

    公开(公告)日:2013-12-17

    申请号:US12984095

    申请日:2011-01-04

    IPC分类号: H04B10/00 H04B10/50

    CPC分类号: H04B10/503 H04B10/572

    摘要: New method to control the optical transmitter is disclosed. The optical transmitter provides both of the ATC feedback loop and the APC feedback loop. When a failure occurs in the ATC feedback loop and the temperature sensor is unable to output an adequate signal any longer, the optical transmitter cuts the APC loop and operates the LD in constant conditions. The output of the monitor PD is transferred to the ATC loop to control the TEC based on the optical output of the LD.

    摘要翻译: 公开了一种控制光发射机的新方法。 光发射机提供ATC反馈环路和APC反馈环路。 当ATC反馈回路发生故障,温度传感器不能再输出足够的信号时,光发射器切断APC回路并在恒定条件下操作LD。 监视器PD的输出被传送到ATC环路,以基于LD的光输出来控制TEC。

    Optically active compounds, smectic liquid crystal compositions
containing them and smectic liquid crystal display devices
    5.
    发明授权
    Optically active compounds, smectic liquid crystal compositions containing them and smectic liquid crystal display devices 失效
    光学活性化合物,含有它们的近晶液晶组合物和近晶液晶显示装置

    公开(公告)号:US4764619A

    公开(公告)日:1988-08-16

    申请号:US842265

    申请日:1986-03-21

    摘要: An optically active compound having the formula: ##STR1## wherein each of Z and Z' is a single bond, --COO--, --OCO--, --CH.sub.2 CH.sub.2 --, --OCH.sub.2 -- or --CH.sub.2 O--, R is an alkyl group having from 1 to 12 carbon atoms, an alkoxyl group having from 1 to 12 carbon atoms, a cyano group or a halogen atom, each of rings A and B is a 1,4-di-substituted phenylene group or a trans-1,4-di-substituted cyclohexylene group, n is 0 or 1, X is ##STR2## wherein * indicates an optical center, and R' is an alkyl group having from 2 to 12 carbon atoms or ##STR3## where R" is a hydrogen atom, an alkyl or alkoxy group having from 1 to 12 carbon atoms, provided that when X is ##STR4## R is the alkyl group or the alkoxy group.

    摘要翻译: 具有下式的光学活性化合物:其中Z和Z'各自为单键,-COO - , - OCO - , - CH 2 CH 2 - , - OCH 2 - 或-CH 2 O-,R为烷基 具有1至12个碳原子的基团,具有1至12个碳原子的烷氧基,氰基或卤素原子,环A和B各自为1,4-二取代的亚苯基或反式-1 ,4-二取代的亚环己基,n为0或1,X为光学中心,R为具有2至12个碳原子的烷基或 其中R“是氢原子,具有1至12个碳原子的烷基或烷氧基,条件是当X是R 1是烷基或烷氧基时。