The linewidth of external cavity diode lasers (ECDLs) is an increasingly important characteristic for experiments in coherent optical communications and atomic physics. The Schawlow-Townes and time-averaged linewidths depend on free parameters of the design, such as cavity length, power, and grating characteristics. We show that the linewidth is also sensitive to the focus, set by the distance between the laser and the collimating lens, due to the effect on the external cavity backcoupling efficiency. By considering these factors, a simple ECDL can readily achieve linewidths below 100 kHz. (C) 2009 Optical Society of America
机构:Korea Res Inst Stand & Sci, Ctr Informat & Telecommun Stand, Taejon 305600, South Korea
Moon, HS
Lee, L
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机构:Korea Res Inst Stand & Sci, Ctr Informat & Telecommun Stand, Taejon 305600, South Korea
Lee, L
Kim, K
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机构:Korea Res Inst Stand & Sci, Ctr Informat & Telecommun Stand, Taejon 305600, South Korea
Kim, K
Kim, JB
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Korea Res Inst Stand & Sci, Ctr Informat & Telecommun Stand, Taejon 305600, South KoreaKorea Res Inst Stand & Sci, Ctr Informat & Telecommun Stand, Taejon 305600, South Korea
机构:Korea Res Inst Stand & Sci, Ctr Informat & Telecommun Stand, Taejon 305600, South Korea
Moon, HS
Lee, L
论文数: 0引用数: 0
h-index: 0
机构:Korea Res Inst Stand & Sci, Ctr Informat & Telecommun Stand, Taejon 305600, South Korea
Lee, L
Kim, K
论文数: 0引用数: 0
h-index: 0
机构:Korea Res Inst Stand & Sci, Ctr Informat & Telecommun Stand, Taejon 305600, South Korea
Kim, K
Kim, JB
论文数: 0引用数: 0
h-index: 0
机构:
Korea Res Inst Stand & Sci, Ctr Informat & Telecommun Stand, Taejon 305600, South KoreaKorea Res Inst Stand & Sci, Ctr Informat & Telecommun Stand, Taejon 305600, South Korea