1.24 An optical source is selected from a batch characterized as having lifetimes that follow a slow internal degradation mode. The -3-dB mean time to failure of these devices at room temperature is specified as 5 x 10“ h. If the device emits 1 mWat room temperature, what is the expected optical output power after 1 month

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4.24 An optical source is selected from a batch
characterized as having lifetimes that follow
a slow internal degradation mode. The –3-dB
mean time to failure of these devices at room
temperature is specified as 5 × 104 h. If the
device emits 1 mW at room temperature, what is
the expected optical output power after 1 month
of operation, after 1 year, and after 5 years?
Transcribed Image Text:4.24 An optical source is selected from a batch characterized as having lifetimes that follow a slow internal degradation mode. The –3-dB mean time to failure of these devices at room temperature is specified as 5 × 104 h. If the device emits 1 mW at room temperature, what is the expected optical output power after 1 month of operation, after 1 year, and after 5 years?
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