KEYWORDS: Fiber Bragg gratings, Semiconductor lasers, Control systems, Wavelength tuning, Voltage controlled current source, Fiber lasers, Light emitting diodes, LED displays, Power supplies, Lithium
In this paper,we introduce a novel tunable external-cavity semiconductor laser that simultaneously achieves rapid tuning rate and tuning precision by mechanical control. A stepping motor is applied in the tuning system. By control of the angular displacement of stepping motor, we can modify the centre wavelength of FBG.
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