Acta Photonica Sinica, Volume. 39, Issue 10, 1747(2010)

Output Characteristics of Nd∶GdVO4 Crystal Under Different Pumping

YOU Jian-cun1,2, SONG Yan-rong1、*, and ZHANG Huai-jin3
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
  • 3[in Chinese]
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    In order to study the output characteristic of Nd∶GdVO4 influenced by 808 nm and 879 nm, coupled by comparison of the CW output laser efficency pumped by the two different wavelengths, the structure of the energy levels of the Nd∶GdVO4 crystal is investigated, and it is found that another absorption wavelength of 879nm is realatively strong. The output characteristics under 808 nm LD pumping and under 879 nm LD pumped are analyzed by experiments. The processes of pumping Nd∶GdVO4 crystal by laser beams of 808 nm and 879 nm wavelength are different. The pumping by 808 nm LD is a process of transfering energy by an indirect way. During the process,the obvious hot load will occur. But pumping by 879 nm LD will drive Nd3+ ions into the laser emitting level, to avoid useless heat generation during no-radiation transition and reduce the thermal effects efficiently.Theoretically, the quantum efficiency of 879 nm is greater than that of 808 nm,so the heat produced from the crystal with pumping should be small. The way of pumping Nd∶GdVO4 crystal is used by laser diode from straight line cavity experimental program, and the process of producing 1 063 nm CW by pumping Nd∶GdVO4 crystal is studied using two different pumping wavelengthes. Lasers under these two different pumping wavelengths are obtained. With the same experimental conditions, the output slope efficiency of pumping crystal by 879 nm LD is a bit higher than by 808 nm in low power. But the output slope efficiency of 879nm is greater than that of 808 nm in high power, and the maximum reaches 38%. Meanwhile, a laser of 1 341 nm is achieved when the pumping at 808 nm, which could be a kind of light source for optical communication.

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    YOU Jian-cun, SONG Yan-rong, ZHANG Huai-jin. Output Characteristics of Nd∶GdVO4 Crystal Under Different Pumping[J]. Acta Photonica Sinica, 2010, 39(10): 1747

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    Paper Information

    Received: Apr. 7, 2010

    Accepted: --

    Published Online: Dec. 7, 2010

    The Author Email: Yan-rong SONG (yrsong@bjut.edu.cn)

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