Introduction to Fiber Optics, 3rd Edition

Spectral width – Figure 14.5

This is the bandwidth of the emitted light. Typical spectral widths lie between

1 nm and 5 nm. A laser with an output of 1310 nm with a spectral width of 4 nm,

would emit infrared light between 1308nm and 1312 nm.

Introduction to Fiber Optics

152

The spectral width of a laser

is about 2 nm and that of an

LED is about 30 nm

Wavelength

LED response

Full power

Power

output

Half power

Laser response

The spectral width is

measured at the half

power point

Figure 14.5

Spectral

widths of LEDs

and lasers

Operating temperature

No surprises here. Typical values are 10°C to 65°C and therefore match the

temperature ranges of fibers quite well.

Voltages ...