The infrared technology of green laser pointer will be discussed in the meeting
In recent years, fiber lasers have low-energy seed pulse, in this way and based on nonlinear polarization rotation effect as compared with the polarization and better environmental stability [11]. However, in passively mode-locked mode, the most commonly used also Limpert J et al [12] is based on the semiconductor can absorb mirror (SAM) approach. SAM-based neodymium glass laser produces a pulse width of 180 fs, center wavelength at 1060 nm, repetition rate of 75 MHz, 100 mW average output power of the seed pulse. The customer has noticed the advantage of green laser pointer price of this green laser pointer
company.
Tunnermann A et al [13] used a similar structure to obtain a pulse width of 144 fs, center wavelength at 1060 nm, repetition rate of 75 MHz, 150 mW average output power of the species (2) where A is a correction factor, it is assumed 4 [3], the refractive index, n is 1 μ m for the wavelength of ultrashort pulses, the damage threshold of about 3.7 MW. 2.2 chirped pulse amplification problems in order to obtain high-intensity laser pulse but will also minimize the cumulative effects of non-linear, since the mid-1980s to make from the use of a chirped pulse amplification (CPA) technology. The technology in the use of low-energy seed pulse to pulse and spectral broadening experience, amplified and re-compression process. The worker should work in three shifts to accomplish all the orders of green laser pointer .
To make the pulse of the best compression, stretcher and compressor must be precisely matched to the dispersion of order 3, which is the traditional pulse chirp 18 Oct. 2008 VOL. 45 NO. 10 REVIEW Comprehensive Review | 1 multi-level laser chirped pulse amplification schematic sub-pulses. In the CPA system, in order to better control the average output power of femtosecond pulses, sometimes directly on the seed pulse repetition rate modulation, for example, by reducing the seed pulse repetition rate, can improve the F. He et al [14] based on the average output pulse power. In 2008, the liquid crystal spatial light modulator pulse shaper, the pulse repetition rate can be the seed from kilohertz to gigahertz range to choose, access to over 100 W average power ultrashort pulses. The weekly report of
should include the manufacturing status of
.
PA CPA technology is currently used mainly for the Er-doped Yb-doped fiber amplifiers and fiber amplifiers, but also Er / Yb co-doped Yb-doped fiber as a wider than the Er-doped optical fiber amplifier. [15] further improved. In 2006, Dupriez et al [19] that the use of a D P.-shaped inner cladding large-mode-area (inner cladding thickness of 400 μ m) Yb3 +-doped double-clad fiber amplifier, using CPA technology, access to a 110 fs, repetition rate of GHz, average power of 200 W femtosecond pulses, the device shown in Figure 2, the seed pulses from the passively mode-locked optically pumped vertical external cavity surface emitting semiconductor laser (VECSEL) available. The workshop held more meetings in the production month of green laser pointer .
In 2007, Yahel E, etc. [9] discussed the concentration of Yb3 + fiber and the fiber length and other factors on the output power spectrum of the ultrashort pulse effect, that there exists an optimal concentration and Yb-doped fiber length, respectively, making the output can be amplified pulse with the largest spectral width and the highest peak power. 3.2 pulse compressor and stretcher dispersion compensation and nonlinear effects in the control problems of research pulse compressor and stretcher dispersion compensation and nonlinear effects in the control of CPA technology is needed to solve key issues in recent years has been made considerable progress. The absorption spectra and emission spectra, no excited-state absorption, no concentration quenching, can have a higher doping concentration and light - the light conversion efficiency (greater than 80%), [16] 18] nearly 40 nm [17, the gain bandwidth to support the pulse width as small as 30 fs. The workshop is training more workers to try to finish the order of
50mW blue violet laser pointer
in advance.
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