发明名称 |
Detecting aging of optical components |
摘要 |
<p>The invention in accordance with one aspect is a method of determining aging of a light emitting device (11) which is capable of selectively emitting light having different wavelengths corresponding to different channels for light transmission as a function of tuning current supplied to the device. A tuning current is applied to the device (11), which results in a wavelength corresponding to a desired channel. The slope of a curve, which is light power from the device (11) as a function of tuning current, is determined by dithering about the applied tuning current. The determined slope is compared with a prior determined value in order to detect any change from the prior value. The voltage derived from a light signal passing through an optical filter (16) can also be measured and compared to a prior value. These values may be used to determine aging of the device (11) and the filter (16). <IMAGE></p> |
申请公布号 |
EP1167943(A2) |
申请公布日期 |
2002.01.02 |
申请号 |
EP20010304691 |
申请日期 |
2001.05.29 |
申请人 |
AGERE SYSTEMS OPTOELECTRONICS GUARDIAN CORPORATION |
发明人 |
BROUTIN, SCOTT L.;PLOURDE, JAMES KEVIN;STAYT, JOHN WILLIAM, JR. |
分类号 |
H01S5/00;H01S5/068;H01S5/40;H01S5/50;H04B10/08;(IPC1-7):G01M11/02 |
主分类号 |
H01S5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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