| 摘要 |
PURPOSE:To equalize the spatial distribution of gain while keeping the absorption efficiency of exciting beam high so as to improve the amplification efficiency by reflecting the transmitted light of the LD exciting beam on a 1/4 wavelength plate and linear polarization plate against a solid laser medium based on that a high output LD is linear polarization, to pass the transmitted light through the medium two times without fail. CONSTITUTION:A solid laser amplifier is composed of laser diodes(LD) 1 and 2, collimators 3 and 4, linear polarization plates 5 and 6, and 1/4 wavelength plates 7 and 8, which are paired and also facing each other respectively, and a solid laser medium is fixed in the center among them and further the refrigerant 10 and 11 are prepared in order to cool the amplifier. The exciting beam from respective LDs 1 and 2 is almost absorbed into the medium 9, however, remaining exciting beam is reflected on the plates 5 and 6 to pass through the medium two times, thereby the spatial distribution of gain can be equalized. |
