People utilized this ASE process to make broadband ASE light source which is essential for many different telecommunications, fiber sensing, fiber optic gyroscope, and test & measurement applications. Since spontaneous emission process can produce photons in a wide wavelength range, such as the C band, C+L band, etc. When amplified by the gain medium, the output is a broadband, high power laser light source.
This figure shows the optical spectrum of 1550nm ASE light source.
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