| 简介 |
The invention concerns a wide spectrum ultrashort compact laser source including a laser primary source (6) with rare earth ions. This source (6) is pumped by a luminous pump flux (9) centred on a wavelength λD, said flux (9) being emitted by a solid laser pump source (8). The primary source (6) emits a primary luminous flux (7) centred on a wavelength λL of spectral width ΔλL. The latter is injected by means of injection optics (10) into a photonic crystal fibre (2) having a length L, a section d, and a set of cavities (4) of diameter φ. Coupling optics (15) collect the luminous flux (12) at the output of the fibre with phonic crystals (2). This luminous flux (12) is centred on a wavelength λF and has a spectral width ΔλF. The spectrum is subjected inside the photonic crystal fibre (2) to a widening due for more than 50% of the phase self-modulation. |
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