| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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An 80-W Laser Diode Array with 0.1 nm Linewidth for Rubidium Vapor Laser Pumping |
| YANG Zi-Ning, WANG Hong-Yan**, LU Qi-Sheng, HUA Wei-Hong, XU Xiao-Jun
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College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073
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| Cite this article: |
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YANG Zi-Ning, WANG Hong-Yan, LU Qi-Sheng et al 2011 Chin. Phys. Lett. 28 104202 |
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Abstract The spectral linewidth of a 64-emitter laser-diode array is effectively suppressed by using a volume Bragg grating (VBG) based external cavity. At a maximal driven current of 90 A, the device produces a cw output of 80W with 1.2 W/A slope efficiency and 0.1 nm spectral linewidth (FWHM) centered at 780 nm. The power extraction efficiency reaches 90% as compared with the free running case. The central wavelength of the narrowed spectrum is tuned over a 0.3 nm range by adjusting the VBG's temperature. The absorption of 45% laser radiation by a 5-mm-long rubidium vapor cell with 150 Torr ethane and 450 Torr helium at 383 K is demonstrated.
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| Keywords:
42.55.Px
42.55.Lt
42.55.Xi
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Received: 13 May 2011
Published: 28 September 2011
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| PACS: |
42.55.Px
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(Semiconductor lasers; laser diodes)
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42.55.Lt
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(Gas lasers including excimer and metal-vapor lasers)
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42.55.Xi
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(Diode-pumped lasers)
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