The market share of laser pointer is one of the comparison index

The market share of laser pointer is one of the comparison index.
Nankai University in 2003 reported the use of pulse peak power of 100kW pump to obtain Q-switched, and get the 60nm tunable Q-switched. November 20, 2003 reported that the Shanghai scientists have made new achievements in the laser field, the successful development of up to 107W output power fiber lasers. This laser is called "high-power ytterbium-doped double-clad fiber laser," compared with the currently available laser and its maintenance costs much lower power consumption, life is ordinary laser a few times. The group in charge of the first floor Qihong researcher told reporters, laser printing with a wide range of applications, and public life such as food directly related to the production date, security signs, etc., instead of the current terms of laser printer ink print resolution high, never fade, difficult to counterfeit, environmentally friendly, with international fashion trends. Xie and TRGosnell with stones titanium device 860nm pump tens of centimeters long, by replacing the output mirror to obtain a different red, orange, green, blue four colors, the power was 300mW, 44mW, 20mW and 3mW , slope efficiency of 52%, 11.5%, 12.4% and 3%. Cladding-pumped converters on the research work is the latest international research focus, research it in the conventional device, based on the use of frequency conversion technology greatly expands the frequency range of available near-infrared light, visible light and even less wavelength output. The quality feedback of laser pointer will be discussed during the meeting. 
The exhibition of laser pointer also draws attention of the manufacturer. It is reported that the structure of the 1554.7-1574.7nm wavelength range, to achieve a channel spacing of 50GHz, 52-channel multi-wavelength DWDM source and channel the difference between the maximum optical power is less than 0.3dB, the extinction ratio of 32dB, output The width of 500MHz. Classical Sagnac interferometer device in the field of information science and technology in ultra-fast response to a variety of applications, including: ultra-fast optical modulator of the all-optical switching, all-optical demultiplexing, signal regeneration, logical operations, signal format conversion, and all optical wavelength conversion and so on. Recently, OFC'2002 literature of a Sagnac interferometer device will broaden the application of the device [12]. Reported in the literature of the multi-wavelength Raman-based NOLM light, in the fourth-order Stokes Shiba, the wavelength channel can output 20. The manager complains that the investment in development of laser pointer is not enough.
In OFC'2002 of another paper, we report a Raman pump using polarization multiplexing source, FP tunable filters and polarization dispersion compensation to the composition of multi-wavelength Raman fiber ring laser cavity. By 1428.2,1445.8,1463.4 nm pump wavelength Raman pump source role, 3dB bandwidth of the output wavelength range up to 58, the channel spacing of 50GHz. Currently associated with the AWG meeting reports have pointed out that the current output of up to 400 channels, each channel spacing 25GHz (wavelength interval of 0.4nm), the output wavelength can cover the entire C-band and L-band. However, the wavelength channel spacing of these are fixed, can not be changed.