The violet laser light source does not refer to a specific wavelength of the laser generator, but refers to a laser generator having a wavelength of 395 to 410 nm. The violet laser light source produced by different manufacturers has a slightly different wavelength, but roughly within this range, There is not much deviation. Purple laser light source was not originally developed for the printing industry. Its application area is mainly the home appliance industry. In the home appliance industry, this kind of laser light source is also called blue laser.
The earliest application of violet laser light sources to the printing industry was Agfa. At the Drupa 2000 exhibition, the first computer-to-plate system using a violet laser diode as a light source was unveiled before the world. At that time, the power of the violet laser diode used in this CTP device was only 5mW, and the exposure could only use a higher speed. Silver Salt Plate.
From 2000 to now, the development speed of violet laser light source is amazing. Since it was originally produced only by Nichia Chemical Industry Co., Ltd., it is no longer mysterious. In order to be able to grasp the latest progress of the current violet laser source more clearly, the author has combed the reports on the development of violet laser diodes in recent years:
year 2002
On February 18, Nichia and Sony Corporation reached an agreement to jointly develop blue-violet diodes for recording and playback of optical discs. The cooperation began in June 2002 and reached volume production capacity in 2003. To speed up the cooperation process, the two companies reached an agreement at the same time so that both parties can share each other's production skills and patented technologies. This is the first time that internationally renowned multinational companies have been involved in the development and production of violet laser light sources, and the development of violet laser light sources has also started to increase.
In 2007
In January, Photonic Products of the United Kingdom took the lead in introducing the 405nm violet laser diode module, which has an external size of 3.5 x 2mm, output power of 25mW and TTL modulation, and produces a stable elliptical beam. This is the debut of the 405nm violet laser light source. , welcomed by users. Due to its high signal-to-noise ratio and high energy density, this module has better accuracy and sensitivity and is suitable for biological and biological analysis applications such as flow cytometry and laser-induced fluorescence detection that collects fluorescence signals as much as possible. .
In March, Nichia announced the successful development of a 320mW high-power semiconductor violet laser diode. This violet laser diode has a lifetime of more than 10,000 hours at a pulse operating mode and a case temperature of 80°C.
In the same month, the University of California, Santa Barbara announced that a research team led by Shuji Nakamura has developed a new type of low-frequency, non-polar, violet laser diode. The power of this violet laser diode is not specifically disclosed, and its wavelength is 405 nm in the pulsed state.
In May, another big crocodile in the field of international home appliances - Japan's Sharp announced that it will start mass production of violet laser diodes of model GH04020A4G. The wavelength of the Sharp violet laser diode is 406mm, and the maximum output capability is 20mW. The 5mW continuous output life is 10,000 hours. What is worth mentioning is that the price of this violet laser source is only 10,000 yen.
Shortly thereafter, Sony's wholly-owned subsidiary, Sony White Stone Semiconductor, announced that its monthly production capacity of purple laser diodes will be expanded to 1.7 million, and in November of that year, 240mW violet laser diodes will be put into operation.
Year 2008
In September, Mitsubishi Chemical announced the commercialization of a gallium nitride substrate for violet laser diodes.
In October, Japan’s Sanyo also announced a violet laser diode whose power was increased to 450mW.
According to the information retrieved by the author from the website of the Nisya company, the output power of the NUV101E violet laser diode (wavelength 400-410nm) provided by Nichia has reached an astonishing 6W, which is higher than the 5mW that was just released. A full 1000 times.
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