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    • 5. 发明申请
    • SEMICONDUCTOR LASER BASED INTRA-CAVITY OPTICAL MICRO-FLUIDIC BIOSENSOR
    • 基于半导体激光器的光敏微流体生物传感器
    • US20120194804A1
    • 2012-08-02
    • US13496886
    • 2010-10-14
    • Jian-Jun HeTingting YuMin Lou
    • Jian-Jun HeTingting YuMin Lou
    • G01N21/41
    • G01N21/7746G01N21/05G01N21/45G01N2021/0346G01N2021/391G01N2021/399G01N2021/458
    • A semiconductor laser based intra-cavity optical micro-fluidic biosensor comprises a coupled-cavity semiconductor laser, a 2×2 coupler and a phase adjustment section on one input port of the coupler. The dominant mode of the coupled-cavity laser appears in one output port of the coupler, while the adjacent mode comes out from the other output port of the coupler. The resonant frequency interval of the sensing cavity is slightly larger or smaller than one half of that of the reference cavity. Part of the sensing cavity is the sensing section which is covered by an analyte. The refractive index change of the analyte will cause the lasing mode of the coupled cavity to switch to an adjacent mode, resulting in a π-phase change in the phase difference between the two output ports of the two resonance cavities. By applying the Vernier effect, the power ratio of the two output ports of the coupler will change and the refractive index change of the analyte can be derived. A detection limit of 10−8 RIU or smaller can be achieved.
    • 基于半导体激光的腔内光学微流体生物传感器包括耦合腔的一个输入端口上的耦合腔半导体激光器,2×2耦合器和相位调整部分。 耦合腔激光器的主要模式出现在耦合器的一个输出端口中,而相邻模式从耦合器的另一个输出端口出来。 感应腔的谐振频率间隔略大于或小于参考腔的谐振频率间隔的一半。 感测腔的一部分是被分析物覆盖的感测部分。 分析物的折射率变化将导致耦合空腔的激光模式切换到相邻模式,导致两个谐振腔的两个输出端口之间的相位差的相位变化。 通过应用游标效应,耦合器的两个输出端口的功率比将改变,并且可以导出分析物的折射率变化。 可以实现10-8 RIU以下的检测限。