Kerr-lens mode-locked Ti:sapphire laser with an additional intracavity nonlinear medium

Han, Xiaowei; Zeng, Heping

doi:10.1364/oe.16.018875

Cited by 7 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…x,y 10) combined with large pump spot diameters in the laser crystal [294]. However, note that the additional telescope increases the range of paramters that need to be adjusted for modelocked operation, and changing the distances within one telescope critically affects the beam diameters in the other telescope [295]. A first step into this direction was also performed with the setup of MIRanda3 : by replacing the end-mirror (EM) in figure 5.6 with a spherical mirror (CM) (see figure 5.20), the short arm of the cavity was extended by an additional telescope.…”

Section: )mentioning

confidence: 99%

A New Generation of Ultrafast Oscillators for Mid-Infrared Applications

Nagl¹

2021

Springer Theses

View full text Add to dashboard Cite

The mid-infrared (MIR) spectral range with wavelengths between 2 µm and 20 µm holds tremendous potential for the study of complex biological systems, given the abundance of intense and unique molecular absorption lines that can be detected. Consequently, spectroscopic applications of mid-infrared radiation have garnered enormous attention in recent years. A particularly striking example is the combination of multi-MHz-repetition-rate, few-cycle MIR light sources with electric-field-resolved techniques, enabling the recording of amplitude-and phase-resolved molecular signals with unparalleled specificity and shot noise limited sensitivity. Despite the ever-growing research demand, their widespread use is severely hampered by the lack of low-noise, compact, and ultrafast laser systems.In this dissertation, a new generation of table-top mid-infrared laser sources is presented, bringing cutting-edge laser diode technology and few-cycle Cr 2+ :ZnS/ZnSe solid-state oscillators together for the first time. Not only have these laser systems proven to reliably provide coherent radiation in the 2 µm to 3 µm region, the simultaneous reduction in size and complexity, accompanied by an improved overall efficiency and -most importantly -noise performance, renders this approach as pioneering for future MIR applications.In total, three laser systems are developed, each of them pushing the frontiers of directly diode-pumped laser technology. The first one is driven by a single-emitter indium phosphide laser diode and delivers more than 500 mW of output power combined with pulse durations as short as 45 fs. With this first ever directly diodepumped Kerr-lens mode-locked (KLM) Cr 2+ :ZnS/ZnSe oscillator, experimental results confirm a highly stable operation. In addition, amplitude noise measurements reveal an excellent low-noise performance of the mode-locked laser output.Driven by the desire to match and exceed the performance of more mature fiber-laser-pumped counterparts and also to boost the efficiency of the envisaged downstream applications, the output of two single-emitter pump laser diodes is carefully combined and implemented into a second-generation design. The achieved peak powers are almost three-times higher compared to before, while the low-noise performance of the KLM output is maintained.xii Typically, the design architecture of laser systems used for generating mid-infrared radiation up to several tens of microns includes a sophisticated chain of amplification, pulse compression and parametric conversion stages. Using a powerful few-cycle mid-infrared oscillator as driving laser source instead not only significantly improves the effectiveness of these nonlinear schemes, but could even supersede the need for initial amplification. The presented third-generation system brings the directly diode-pumped Cr 2+ :ZnS/ZnSe solid-state laser technology to a new level; with output peak powers reaching 1 MW and pulse durations as short as 28 fs, direct generation of CEP-stable mid-infrared pulses in a nonlinear optical cryst...

show abstract

Section: )mentioning

confidence: 99%

A New Generation of Ultrafast Oscillators for Mid-Infrared Applications

Nagl¹

2021

Springer Theses

View full text Add to dashboard Cite

show abstract

“…It can be especially beneficial for the laser systems where an MM LD is used for pumping. The use of an additional Kerr medium has been investigated for bulk KLM lasers [19,[21][22][23][24][25][26][27][28][29][30][31]. Recently, high power KLM lasers with MM LD pumping and an enhanced Kerr effect have been reported for Yb:Lu 2 O 3 ceramic (135 fs, 1.83 W) [21] and Yb:CALYO lasers (68 fs, 1.5 W) [19].…”

Section: Introductionmentioning

confidence: 99%

Kerr-lens mode locking of a diode-pumped Yb:KGW laser using an additional intracavity Kerr medium

Akbari¹

2018

Laser Phys. Lett.

View full text Add to dashboard Cite

Kerr-lens mode-locked operation of a Yb:KGW laser pumped by a multimode laser diode with the help of an additional Kerr medium is reported. With an enhanced Kerr lensing effect in the laser cavity operating far from the stability edge limit, the laser delivered 74 fs pulses with an average output power of 500 mW. In the high power regime of operation (>500 mW), the mode-locked laser output was accompanied by a continuous wave background radiation. Owing to the self-phase modulation effect, the laser demonstrated the generation of shorter pulses as compared to the case without an additional Kerr medium.

show abstract

“…Intracavity second harmonic generation (SHG) in longitudinal diode end pumped Nd : YVO 4 lasers with KTP and LBO nonlinear crystals is a common method to produce continuous wave green lasers with low intensity noise and good beam quality. These systems have numerous applications in science and technology [1][2][3]. The main challenge in this type of laser is intensity noise due to nonlinear coupling of longitudinal modes, referred to as the green problem.…”

Section: Introductionmentioning

confidence: 99%

The effects of TGG crystal length on output power and beam quality of a unidirectional ring Nd:YVO₄laser with and without second harmonic generation

et al. 2018

View full text Add to dashboard Cite

The effect of terbium gallium garnet (TGG) crystal length on 1064 and 532 nm output powers and beam quality of a unidirectional ring Nd : YVO 4 laser is investigated. In the case of 1064 nm (without nonlinear crystal), the laser output power without considerating the effect of TGG crystal was computed theoretically. Then three TGG crystals with different lengths were placed in the laser setup one by one. A systematic decrease in output power was observed by increasing the TGG crystal length. The experiment was repeated in the case of 532 nm. It was found that in a 532 nm laser, higher laser efficiency and small beam quality degradation can be achieved by increasing the TGG crystal length leading to a 5.7 W green laser with 27 W pump power. The power stability and beam quality were 0.8% for 30 min and less than 1.3, respectively.

show abstract

Kerr-lens mode-locked Ti:sapphire laser with an additional intracavity nonlinear medium

Cited by 7 publications

References 14 publications

A New Generation of Ultrafast Oscillators for Mid-Infrared Applications

A New Generation of Ultrafast Oscillators for Mid-Infrared Applications

Kerr-lens mode locking of a diode-pumped Yb:KGW laser using an additional intracavity Kerr medium

The effects of TGG crystal length on output power and beam quality of a unidirectional ring Nd:YVO₄laser with and without second harmonic generation

Contact Info

Product

Resources

About

Kerr-lens mode-locked Ti:sapphire laser with an additional intracavity nonlinear medium

Cited by 7 publications

References 14 publications

A New Generation of Ultrafast Oscillators for Mid-Infrared Applications

A New Generation of Ultrafast Oscillators for Mid-Infrared Applications

Kerr-lens mode locking of a diode-pumped Yb:KGW laser using an additional intracavity Kerr medium

The effects of TGG crystal length on output power and beam quality of a unidirectional ring Nd:YVO4laser with and without second harmonic generation

Contact Info

Product

Resources

About

The effects of TGG crystal length on output power and beam quality of a unidirectional ring Nd:YVO₄laser with and without second harmonic generation