▎ 摘　　要

NOVELTY - The method involves emitting 1.9 mu m pump light by a first pump laser (9) is incident on first isolation device (7). The computer system (12) receives the oscilloscope (11) feedback signal and then the computer system is pre-stored analog information for comparison. The parameters of first pump laser, second pump laser (10), graphene Bragg grating (4) and quartz disperser prism (5) are automatically adjusted until performance of output light is satisfied according to comparison result. The pre-stored analog information agrees with each other so as to obtain laser output of picoline width. USE - Narrow linewidth laser output method. ADVANTAGE - The method saves the cost of manpower dimming, and can realize maximum automation. The output performance of the single-doped Tm: yttrium orthovanadate (YVO4) solid-state laser can be greatly improved, and has a compact structure and good stability. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of a computer-controlled ultra-narrow pulse width laser output structure. Graphene Bragg grating (4) Quartz disperser prism (5) First isolation device (7) First pump laser (9) Second pump laser (10) Computer system (12)