Up-conversion laser
AssigneeKabushiki Kaisha Toshiba
InventorsKen Itoh, Hideaki Okano, Kiyoyuki Kawai, Ritsuo Yoshida
Life of this patent
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Abstract
An up-conversion laser unit in which a semiconductor laser of high output power can be used as a pump light source and the wavelength of up-converted laser light is suitable for display. The light of infrared wavelength is generated by the pump light source, the generated light being inputted into a Pr3+ up-conversion laser to up-convert there into red light by Pr3+ ion. The up-converted red light is inputted into, as a pump light source, a Tm3+ up-conversion laser, there being up-converted into blue light by the Tm3+ ion. Thereby, efficient up-conversion into blue light is made possible.
Claims12
An up-conversion laser equipment, comprising:
- a first up-conversion laser which pumps praseodymium ions (Pr3+), emitting light of wavelengths of approximately 685 nm and approximately 635 nm;
- and
- a second up-conversion laser which pumps thulium ions (Tm3+) with the light of wavelength of approximately 685 nm and further pumps the excited thulium ion with the light of wavelength of approximately 635 nm, output laser light of the second up-conversion laser being wavelengths of approximately 450 nm and/or approximately 480 nm.
An up-conversion laser equipment, comprising:
- a first cavity including an external resonance laser and a praseodymium ion (Pr3+) doped optical fiber wherein with laser light emitted from the external resonance laser as pump light, the praseodymium ion undergoes up-conversion pumping to generate red light of wavelengths of approximately 685 nm and approximately 635 nm;
- and
- a second cavity including a thulium ion (Tm3+) doped optical fiber, wherein the red light pumps the thulium ion to generate blue light.
An up-conversion equipment, comprising:
- a cavity including an external resonance laser emitting two kinds of laser light of wavelengths of from 780 nm to 900 nm and from 950 nm to 1050 nm;
- a P3+ and Yb3+ ion doped optical fiber disposed in the cavity, into which the laser light is inputted;
- and
- a resonator disposed in the cavity to resonate red light generated through up-conversion by the optical fiber.
An up-conversion equipment, comprising:
- a cavity including an external resonance laser emitting two kinds of laser light of wavelengths of from 780 nm to 900 nm and from 950 nm and 1050 nm;
- a P3+ and Yb3+ ion doped optical fiber, disposed in the cavity, into which the laser light is inputted;
- and
- a resonator disposed in the cavity to resonate green light generated through up-conversion by the optical fiber.
Dependencies are inferred from the claim text.