| Beam Profile Improvement of a LD Array by an External Cavity with Photorefractive Phase Conjugate Mirror |
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| 作者姓名： | HONG Zhi CHEN Jun |
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| 作者单位： | HONG Zhi CHEN Jun (State Key Laboratory of Modern Optical Instrumentation，Zhejiang University，Hangzhou 310027，China)H. J. Eichler，A. Hermerschmidt，P. Pogany，M. Kammerer (Optical Institute，Technical University of Berlin，Germany) |
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| 摘 要： | 1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｓｅｍｉｃｏｎｄｕｃｔｏｒｌａｓｅｒ ｄｉｏｄｅａｒｒａｙｓａｒｅｖｅｒｙａｔｔｒａｃｔｉｖｅｆｏｒｔｈｅｉｒｃｏｍｐａｃｔｎｅｓｓ,ｓｉｍｐｌｅｏｐｅｒａｔｉｏｎ,ｌｏｎｇｌｉｆｅｔｉｍｅ,ａｎｄｈｉｇｈｅｌｅｃｔｒｉｃａｌｔｏｏｐｔｉｃａｌｃｏｎｖｅｒｓｉｏｎｅｆｆｉｃｉｅｎｃｙ.Ｈｏｗｅｖｅｒｔｈｅｓｅｈｉｇｈｐｏｗｅｒｓｏｕｒｃｅｓｈａｖｅａｎｏｎ ｄｉｆｆｒａｃｔｉｏｎ ｌｉｍｉｔｅｄｒａｄｉａｔｉｏｎｐａｔｔｅｒｎｗｉｔｈｖｅｒｙｌｏｗｃｏｈｅｒｅｎｃｅｌｅｎ…
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| 关 键 词： | external cavity photorefractive phase conjugator laser diode array (LD array) Rh∶BaTiO 3 crystal |
| 收稿时间： | 1999/12/3 |
Beam Profile Improvement of a LD Array by an External Cavity with Photorefractive Phase Conjugate Mirror |
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| HONG Zhi,CHEN Jun.Beam Profile Improvement of a LD Array by an External Cavity with Photorefractive Phase Conjugate Mirror[J].中国激光(英文版),2000,9(4):297-302. |
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| Authors: | HONG Zhi CHEN Jun |
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| Abstract: | A technique for improvement of the beam profile of a LD array by an external cavity with self-pumped photorefractive phase conjugate mirror is presented. A spatially filtered part of the far field from the negative lobe of a gain-guided LD array is directly coupled to a phase conjugating rhodium doped barium titanate crystal. The positive lobe power increases remarkably at low drive current. Beam energy increases significantly at emission angle centered close to 2.3°at different drive current. A large fraction of power in the positive lobe is contained in a Gaussian spike of width 1.34× diffraction limit (FWHM of the far field is 0.75°). |
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| Keywords: | external cavity photorefractive phase conjugator laser diode array (LD array) Rh:BaTiO3 crystal |
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