Title :
Laser linewidth broadening caused by a laser amplifier
Author :
Berglind, Eilert ; Nilsson, Olle
Author_Institution :
Dept. of Microwave Eng., R. Inst. of Technol., Stockholm, Sweden
fDate :
5/1/1991 12:00:00 AM
Abstract :
It is shown that a laser amplifier connected to a laser will broaden the linewidth with a factor on the order of the laser multiplier power gain. The laser linewidth can be broadened in comparison to the free-running linewidth if the laser is connected to a laser amplifier because the noise emitted by the amplifier enters the laser and perturbs the oscillation. The broadening factor can be reduced to unity by inserting an isolator between the laser and the laser amplifier.<>
Keywords :
lasers; spectral line breadth; broadening factor; laser amplifier; laser linewidth broadening; laser multiplier power gain; noise; oscillation; Circuits; Erbium-doped fiber amplifier; Erbium-doped fiber lasers; Laser noise; Optical amplifiers; Optical fiber communication; Phase noise; Power lasers; Semiconductor device noise; Semiconductor lasers;
Journal_Title :
Photonics Technology Letters, IEEE
