| Achieving single-lobed far-field patterns of broad area laser diode with external cavity feedback |
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| 作者姓名： | 葛剑虹 陈军 H.J.Eichler |
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| 作者单位： | The State Key Laboratory of Modern Optical Instrumentation，Zhejiang University，Hangzhou 310027，The State Key Laboratory of Modern Optical Instrumentation，Zhejiang University，Hangzhou 310027，Optisches Institut，Technische Univeisitat Berlin，StraBe des 17. Juni 135，10623 Berlin，Germany，Optisches Institut，Technische Univeisitat Berlin，StraBe des 17. Juni 135，10623 Berlin，Germany |
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| 基金项目： | This work was supported by the National Natural Science Foundation of China under Grant No. 60278038. |
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| 摘 要： | We demonstrate a technique for single transverse mode operation of high-power broad area laser diode (BAL). In the experiment, the HR mirror is used as an external cavity mirror and the grating is used as a wavelength selective component. By tiling the HR mirror and the grating, the number of transverse modes oscillating in the cavity can be limited and the spectral bandwidth of the laser diode can be reduced. A single-lobed near diffraction-limited laser beam with the beam divergence (FWHM) of 0.43°, the spectral line-width of 0.7 nm and the output power of 350 mW are obtained. With the feedback, the power density of the output laser beam is increased 6 times in comparison with the free running.
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Achieving single-lobed far-field patterns of broad area laser diode with external cavity feedback |
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| Andreas Hermerschmidt,H.J.Eichler.Achieving single-lobed far-field patterns of broad area laser diode with external cavity feedback[J].中国光学快报(英文版),2003,1(6). |
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| Authors: | Andreas Hermerschmidt HJEichler |
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| Abstract: | We demonstrate a technique for single transverse mode operation of high-power broad area laser diode(BAL). In the experiment, the HR mirror is used as an external cavity mirror and the grating is used as a wavelength selective component. By tiling the HR mirror and the grating, the number of transverse modes oscillating in the cavity can be limited and the spectral bandwidth of the laser diode can be reduced. A single-lobed near diffraction-limited laser beam with the beam divergence (FWHM) of 0.43°, the spectral line-width of 0.7 nm and the output power of 350 mW are obtained. With the feedback, the power density of the output laser beam is increased 6 times in comparison with the free running. |
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