| 摘要 |
PATENTS RCA 82,340 DEVICE AND METHOD FOR MONITORING A LIGHT EMITTING DEVICE A light emitting device which has a substrate and a cavity region overlying the substrate. The cavity region has a grating region overlying exposed portions of the surface formed of a first grating region having a first period and a second grating region having a period different from the first region. On other portions of the cavity region an active region overlies the cavity layer and a capping layer overlies the active region. The device is monitored by forming a surface emitting device with first and second gratings with the gratings having different periods. Current is applied to the device such that radition is emitted from the grating and the output is detected from the second grating such that the current to the device is adjusted based on the output of the second grating. |
