It is the practical application of green laser pointer

Slow-axis divergence control aspects, recent studies show that, Apart from the device's own structure, the drive current density and thermal effects together influence the size of the semiconductor laser slow axis divergence angle of that is, the long cavity length single components of slow-axis divergence angle the most easy to control, while in the array of devices, with the increase of the fill factor, the light-emitting unit of thermal crosstalk between the intensification will lead to increases in the slow-axis divergence. 2009, Bookham, Inc., Switzerland Preparation of 5 mm cavity length, 9XX nm, band 10 W commercial devices, the success of slow-axis divergence angle (95% energy range) from the original. 10o ~ 12o reduced to the 7o about; the same year, the German Osram company , preparation of Coherent array of slow-axis divergence of the devices (95% energy range) up to 7o level. When the teacher performs the electronic teaching, china laser pointer can be used.
Cm array of semiconductor laser standards development status. Standard cm array in order to obtain high power output and slow axis scale of 1 cm substrate horizontal parallel integration of multiple single semiconductor laser components, semiconductor laser devices, has long been the most commonly used in high power semiconductor laser form of high-power devices. Along with high-quality, low defect epitaxial growth of semiconductor materials technology, and the cavity surface passivation techniques to improve the existing CM Bar cavity length from 0.6 to 1.0 mm increased to 2.0 ~ 5.0mm, making the CM Bar output power substantially improved. It is unnecessary for the customer to go to the screen for a closer contact with the screen for the good explanation becausechina laser pointer is adopted.
In early 2008, Spectra Physics Hanxuan Li, Preparation of 5 mm cavity length, the fill factor of 83% of the semiconductor laser array, using double-sided micro-channel heat sink cooling in the center wavelength at 808 nm, 940 nm, 980 nm 800 W / bar, 1010W/bar, 950 W / bar, the current laboratory up to the CM Bar, continuous power output level. In addition, Germany, JENOPTIK, Switzerland Oclaro a number of semiconductor laser suppliers also continued with the preparation of the kilowatt-class diode laser array, which Oclaro J. Müller, it is clear that the preparation in the existing technical conditions for 1.5kW/bar array device is not a problem. Also, there are the page up and page down button onchina laser pointer.
At the same time, the power with high beam quality, low fill factor CM Bar, Table 1 for the German Limo company with a different filling factor CM Bar BPP results in Table 1, the lateral dimensions of a semiconductor laser array device The fill factor and BPP is proportional to the divergence angle is the same situation, that is, the lower the fill factor, the optical parameters of the product of the smaller, the better the beam quality. At present, 9XX nm band 20% fill factor CM Bar, continuous output power up to 180 W / bar, the product of the optical parameters of the symmetry of the fast and slow axis beam quality up to 5.9 mm? Mrad, commercially available devices can be long-term stable work in more than 80W. And at the same time, they can control the computer to show the content they want to mainly present on the screen of the projection screen through pressing the button of china laser pointer.
2.5% fill factor CM Bar, continuous output power of up to 50 W / bar, fast and slow axis beam quality symmetrical after optical parameters of the product of up to 2.1mm? Mrad, this device is still in the research and development, the need to further improve the stability of output power . However, along with the CM Bar-power continuous improvement and high beam quality requirements for the fill factor decreases gradually, a new problem arises, in particular, is accompanying the high cost of low voltage high current constant current power supply and micro channel heat sink thermal short life is gradually becoming apparent. It is the practical application of green laser pointer.