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Research on Mid-Infrared Parametric Oscillators – Part 07
3.2 Output Characteristics of OPO To further investigate the impact of the reversal effect on the output laser characteristics, a photodetector was used to monitor the time-domain signals of the remaining pump laser at the highest pump power using a PBS (www.wisoptic.com) at output mirror trans...Read more -
Research on Mid-Infrared Parametric Oscillators – Part 06
3. Experimental Results and Analysis 3.2 Output Characteristics of OPO The spacing between coupling lenses M1 and M2, which pump the MgO:PPLN (www.wisoptic.com) fiber pulsed laser described above, was adjusted. Using a focal spot analyzer, the beam waist diameter of the focused spot was observed ...Read more -
Research on Mid-Infrared Parametric Oscillators – Part 05
3 Experimental Results and Analysis 3.1 Output Characteristics of Fiber Pulsed Lasers The laser power after passing through the isolation collimator and the PBS was measured using a power meter (Ophir FL250 A-BB-50), and the results are shown in Figure 4. It can be seen that the output power of ...Read more -
Research on Mid-Infrared Parametric Oscillators – Part 04
2. Theoretical Analysis of OPO According to the quasi-phase matching condition, the energy and momentum conservation laws during the OPO nonlinear three-wave frequency conversion process are as follows: 1/λp = 1/λs + 1/λi (1) np/λp - ns/λs - ni/λi - 1/Λ = 0 (2) In this ...Read more -
Research on Mid-Infrared Parametric Oscillators – Part 03
Experimental Setup The OPO system, as illustrated in Figure 2, comprises a polarizing beam splitter (PBS), a half-waveplate (HWP), a Faraday rotator (FR), a coupling lens group (M1 and M2), cavity mirrors (M3 and M4), an MgO:PPLN crystal, a temperature-controlled oven, and a beam splitter (M...Read more -
Research on Mid-Infrared Parametric Oscillators – Part 02
Introduction With the rapid development of fiber pulse lasers, fiber pulse lasers are widely used in OPO technology. Compared with all-solid-state lasers, fiber lasers have the advantages of flexible and compact structure, high reliability, good beam quality and low cost, and have become the p...Read more -
Research on Mid-Infrared Parametric Oscillators – Part 01
Introduction Lasers in the 3–5 μm band occupy an atmospheric window and have significant applications in laser communication, atmospheric monitoring, and laser medicine. Optical parametric oscillation (OPO) technology, as an important means of realizing mid-infrared lasers, offers advantages su...Read more -
High-Power Mid-Infrared Ultrafast Sources at 2 – 5μm Based on Dual-Wavelength Source – Part 10
Conclusion To obtain high-power tunable short-wavelength mid-infrared ultrashort pulses, this paper utilizes an erbium-doped fiber laser (EDF-LAD) and employs nonlinear amplification and compression methods. Part of the energy is broadened to 1.03 μm via a highly nonlinear fiber, serving as seed...Read more -
High-Power Mid-Infrared Ultrafast Sources at 2 – 5μm Based on Dual-Wavelength Source – Part 9
3 Difference frequency generation of high-power mid-infrared ultrafast light sources 3.3 Differential frequency generation of 2-5 μm high-power tunable mid-infrared ultrashort pulses To obtain a 2-5 μm high-power tunable mid-infrared ultrashort pulse, a 1.55 μm high-energy ultrashort pulse is us...Read more -
High-Power Mid-Infrared Ultrafast Sources at 2 – 5μm Based on Dual-Wavelength Source – Part 8
3 Difference frequency generation of high-power mid-infrared ultrafast light sources 3.2 Difference frequency generation for producing high-power mid-infrared ultrashort pulses at 3μm The time delay line was adjusted to synchronize the pump pulse and signal pulse in time, and the variation of mi...Read more -
High-Power Mid-Infrared Ultrafast Sources at 2 – 5μm Based on Dual-Wavelength Source – Part 7
3 Difference frequency generation of high-power mid-infrared ultrafast light sources 3.2 Difference frequency generation for producing high-power mid-infrared ultrashort pulses at 3μm We built a DFG (Difference Frequency Generation) system based on a high-power dual-wavelength ultrafast fiber...Read more -
High-Power Mid-Infrared Ultrafast Sources at 2 – 5μm Based on Dual-Wavelength Source – Part 6
3 Difference frequency generation of high-power mid-infrared ultrafast light sources 3.1 High-power tunable dual-wavelength ultrafast fiber laser The other pulse train serves as the seed for the erbium-doped CPA system. After fiber broadening, two-stage single-mode fiber amplification, one-st...Read more
