Abstract:
Provided are a femtosecond laser apparatus and a femtosecond laser system including the same. The femtosecond laser apparatus includes a first laser medium having an Ng axis, an Np axis and an Nm axis spatially vertical thereto; a second laser medium having an Np axis substantially in parallel with the Ng axis of the first laser medium, an Nm axis substantially in parallel with the Np axis of the first laser medium, and an Ng axis substantially in parallel with the Nm axis of the first laser medium; and a first laser diode and a second laser diode arranged for projecting pumping lights to the first laser medium and the second laser medium respectively. The first laser medium is arranged such that the progress direction of a laser beam generated by the first and the second laser medium is substantially in parallel with the Ng axis of the first laser medium and the polarization direction of a laser beam generated by the first and the second laser medium is substantially in parallel with the Np axis of the first laser medium. The second laser medium is arranged such that the progress direction of the laser beam generated by the first and the second laser medium is substantially in parallel with the Np axis of the second laser medium and the polarization direction of the laser beam generated by the first and the second laser medium is substantially in parallel with the Nm axis of the second laser medium.
Abstract:
펨토초 레이저 장치 및 이를 포함한 펨토초 레이저 시스템을 제공한다. 펨토초 레이저 장치는 공간적으로 서로 수직방향의 Ng, Np, Nm축을 갖는 제 1 레이저 매질; 상기 제 1 레이저 매질의 Ng축에 실질적으로 평행한 Np축, 상기 제 1 레이저 매질의 Np 축에 실질적으로 평행한 Nm축, 상기 제 1 레이저 매질의 Nm축에 실질적으로 평행한 Ng축을 갖도록 배치된 제 2 레이저 매질; 및 상기 제 1 레이저 매질 및 상기 제 2 레이저 매질에 각각 펌핑광을 조사하기 위하여 배치된 제 1 레이저 다이오드 및 제 2 레이저 다이오드를 포함하고, 상기 제 1 레이저 매질은, 상기 제 1 및 제 2 레이저 매질로부터 발생된 레이저 빔의 진행방향이 상기 제 1 레이저 매질의 Ng축에 실질적으로 평행하도록 배치되고, 상기 제 1 및 제 2 레이저 매질로부터 발생된 레이저 빔의 편광방향이 상기 제 1 레이저 매질의 Np축에 실질적으로 평행하도록 배치되고, 상기 제 2 레이저 매질은, 상기 제 1 및 제 2 레이저 매질로부터 발생된 레이저 빔의 진행방향이 상기 제 2 레이저 매질의 Np축에 실질적으로 평행하도록 배치되고, 상기 제 1 및 제 2 레이저 매질로부터 발생된 레이저 빔의 편광방향이 상기 제 2 레이저 매질의 Nm축에 실질적으로 평행하도록 배치된다.
Abstract:
PURPOSE: A femtosecond laser device is provided to form a pumping module as well as to be mechanically connected with optical mounts mounting optical components forming a diode pumping part by using a bar with a low thermal expansion coefficient, and to separate the pumping module, formed thus, from a laser platform or a case as much as possible in order to provide stable mode locking and increase output stability and beam stability in an ultra-short laser. CONSTITUTION: A femtosecond laser device using a laser diode optical pumping module includes the following parts: a laser diode(10) for the pumping of light source; a half-wave plate(11) for adjusting the polarizing direction of the pumping light source arranged in order; a collimating lens(13) and a focusing lens(14) to efficiently apply output beams of the laser diode to a laser crystal(12) and improve mode combination; a laser crystal for the focusing of the pumping light source; and dichroic mirrors(15a,15b) arranged at the front and rear of the laser crystal for the reflection of the laser beam and for the transmission of the pumping light source. The half-wave plate, collimating lens, focusing lens, and dichroic mirrors are formed in an optical pumping module form integrated by mechanical connection, and installed to be separated from a laser platform(16).
Abstract:
Provided are a femtosecond laser apparatus and a femtosecond laser system including the same for improving beam alignment. The femtosecond laser apparatus includes: a first laser medium and a second laser medium which face each other; a first laser diode and a second laser diode which are arranged to input pumping light to the first laser medium and the second laser medium; and a beam dumper which is arranged between the first laser medium and the second laser medium and includes a hole for transmitting a laser beam from the first laser medium and the second laser medium and a beam absorbing unit which is formed around the hole to block or absorb the pumping light which is not absorbed in the first laser medium and the second laser medium.