| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a pulse laser which maintains a peak power over a wide range repetition frequency, and can control the nonlinear effect.SOLUTION: An apparatus (380) for providing optical radiation (381) includes a seed laser (382) providing seeding radiation (387), and at least one amplifier (383) for amplifying the seeding radiation (387). The seed laser (382) is a Fabry-Perot semiconductor laser, and connected with the amplifier (383). The amplifier (383) includes an optical fiber (1) having a core (3) of refractive index n1, and a pedestal (4) of refractive index n2. The optical fiber (1) includes a first cladding (5) produced of glass of refractive index n3 surrounding the pedestal (4), where n1 is larger than n2, and n2 is larger than n3.</p> |
