{"id":4216,"date":"2026-02-11T15:30:51","date_gmt":"2026-02-11T07:30:51","guid":{"rendered":"https:\/\/laserdiode-ld.com\/?p=4216"},"modified":"2026-01-26T13:22:44","modified_gmt":"2026-01-26T05:22:44","slug":"%ec%8a%a4%ed%8e%99%ed%8a%b8%eb%9f%bc-%ec%88%9c%eb%8f%84-%ec%97%94%ec%a7%80%eb%8b%88%ec%96%b4%eb%a7%81-%ed%98%91%ec%84%a0%ed%8f%ad-dfb-%ed%8c%8c%ec%9d%b4%eb%b2%84-%ea%b2%b0%ed%95%a9-%eb%a0%88%ec%9d%b4","status":"publish","type":"post","link":"https:\/\/laserdiode-ld.com\/ko\/%ec%8a%a4%ed%8e%99%ed%8a%b8%eb%9f%bc-%ec%88%9c%eb%8f%84-%ec%97%94%ec%a7%80%eb%8b%88%ec%96%b4%eb%a7%81-%ed%98%91%ec%84%a0%ed%8f%ad-dfb-%ed%8c%8c%ec%9d%b4%eb%b2%84-%ea%b2%b0%ed%95%a9-%eb%a0%88%ec%9d%b4-2","title":{"rendered":"\uc2a4\ud399\ud2b8\ub7fc \uc21c\ub3c4\uc758 \ubb3c\ub9ac\ud559: \uc5d4\uc9c0\ub2c8\uc5b4\ub9c1 \ud611\uc120\ud3ed DFB \uad11\uc12c\uc720 \uacb0\ud569 \ub808\uc774\uc800"},"content":{"rendered":"

\ucf54\ud788\uc5b4\ub7f0\uc2a4\uc758 \uc544\ud0a4\ud14d\ucc98: \ub2e8\uc21c\ud55c \uad11\uc790 \ubc29\ucd9c\uc744 \ub118\uc5b4\uc11c<\/h2>\n\n\n\n

\uad11\uc804\uc790 \uc804\ubb38 \ubd84\uc57c\uc5d0\uc11c\ub294 DFB(\ubd84\uc0b0 \ud53c\ub4dc\ubc31) \uad11\uc12c\uc720 \uacb0\ud569 \ub808\uc774\uc800<\/strong> \ub294 \ubc18\ub3c4\uccb4 \uc2a4\ud399\ud2b8\ub7fc \uc81c\uc5b4\uc758 \uc815\uc810\uc744 \ub098\ud0c0\ub0c5\ub2c8\ub2e4. \ud45c\uc900 \ud30c\ube0c\ub9ac-\ud398\ub85c \ub808\uc774\uc800\ub294 \uc5ec\ub7ec \uc885\ubc29\ud5a5 \ubaa8\ub4dc\uac00 \uce90\ube44\ud2f0 \ub0b4\uc5d0\uc11c \uc9c4\ub3d9\ud558\uc5ec \uc2a4\ud399\ud2b8\ub7fc\uc774 \ub113\uace0 \ubd88\uc548\uc815\ud558\uc9c0\ub9cc, DFB \uc544\ud0a4\ud14d\ucc98\ub294 \ub808\uc774\uc800\uac00 \ub2e8\uc77c\uc758 \uc815\ubc00\ud55c \uc8fc\ud30c\uc218\uc5d0\uc11c \uc791\ub3d9\ud558\ub3c4\ub85d \uac15\uc81c\ud569\ub2c8\ub2e4. \uc774\ub294 \ub2e8\uc21c\ud788 \u201c\uae68\ub057\ud55c\u201d \ube5b\uc744 \uc120\ud638\ud558\ub294 \uac83\uc774 \uc544\ub2c8\ub77c \ubd84\uc0b0 \uc74c\ud5a5 \uac10\uc9c0(DAS) \ub610\ub294 \ucf54\ud788\uc5b4\ub7f0\ud2b8 \uad11\ud1b5\uc2e0\uacfc \uac19\uc740 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c \uc2a4\ud399\ud2b8\ub7fc \uc21c\ub3c4\ub294 \uc2dc\uc2a4\ud15c \uc131\ub2a5\uc758 \uadfc\ubcf8\uc801\uc778 \uc6d0\ub3d9\ub825\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\ub2e4\uc911 \ubaa8\ub4dc \uc18c\uc2a4\uc5d0\uc11c \ub2e8\uc77c \uc8fc\ud30c\uc218\ub85c \uc804\ud658\ud558\uae30 1550nm DFB \ub808\uc774\uc800<\/strong> \ub294 \uce90\ube44\ud2f0 \ubb3c\ub9ac\ud559\uc758 \uae09\uc9c4\uc801\uc778 \ubcc0\ud654\ub97c \uc218\ubc18\ud569\ub2c8\ub2e4. DFB \ub808\uc774\uc800\ub294 \ubc18\ub3c4\uccb4 \uce69\uc758 \uc808\ub2e8\uba74\uc5d0 \uac70\uc6b8 \uc5ed\ud560\uc744 \ud558\ub294 \ub300\uc2e0 \uc8fc\uae30\uc801 \uad6c\uc870\uc778 \ube0c\ub798\uadf8 \uaca9\uc790\ub97c \uce69\uc758 \ud65c\uc131 \uc601\uc5ed\uc5d0 \uc9c1\uc811 \ud1b5\ud569\ud569\ub2c8\ub2e4. \uc774 \uaca9\uc790\ub294 \uc8fc\ud30c\uc218 \uc120\ud0dd \ud544\ud130 \uc5ed\ud560\uc744 \ud558\uc5ec \ub2e8\uc77c \ud30c\uc7a5\ub9cc \uac74\uc124\uc801\uc778 \uac04\uc12d\uc744 \ubc1b\ub3c4\ub85d \ud5c8\uc6a9\ud569\ub2c8\ub2e4. \uc5d4\uc9c0\ub2c8\uc5b4\uc758 \uacfc\uc81c\ub294 \uc774 \uaca9\uc790\ub97c \uad6c\ud604\ud558\uace0 \uc774\ud6c4 \uc774\ub97c \uacb0\ud569\ud558\uc5ec \ud3b8\uad11 \uc720\uc9c0 \uad11\uc12c\uc720 \ub808\uc774\uc800<\/a><\/strong> \uc704\uc0c1 \ub178\uc774\uc988\ub098 \uae30\uacc4\uc801 \ubd88\uc548\uc815\uc131\uc744 \uc720\ubc1c\ud558\uc9c0 \uc54a\ub294 \uc2dc\uc2a4\ud15c\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc591\uc790 \uaca9\uc790 \ubb3c\ub9ac\ud559: \uc8fc\ud30c\uc218 \uc120\ud0dd\uc758 \uba54\ucee4\ub2c8\uc998<\/h2>\n\n\n\n

DFB \ub808\uc774\uc800\uc758 \ud575\uc2ec\uc740 \ub0b4\ubd80 \ube0c\ub798\uadf8 \uaca9\uc790\uc785\ub2c8\ub2e4. \uc774 \uaca9\uc790\ub294 \ub808\uc774\uc800 \uce90\ube44\ud2f0\uc758 \uc138\ub85c \ucd95\uc744 \ub530\ub77c \uad74\uc808\ub960\uc774 \uc8fc\uae30\uc801\uc73c\ub85c \ubcc0\ud654\ud558\ub294 \uac83\uc785\ub2c8\ub2e4. \ubb3c\ub9ac\ud559\uc740 \ube0c\ub798\uadf8 \uc870\uac74\uc758 \uc9c0\ubc30\ub97c \ubc1b\uc2b5\ub2c8\ub2e4:<\/p>\n\n\n\n

$$\\lambda_{Bragg} = 2 \\cdot n_{eff} \\cdot \\Lambda$$<\/p>\n\n\n\n

\uc5ec\uae30\uc11c $\\lambda_{Bragg}$\ub294 \ubaa9\ud45c \ud30c\uc7a5, $n_{eff}$\ub294 \ub3c4\ud30c\uad00\uc758 \uc720\ud6a8 \uad74\uc808\ub960, $\\Lambda$\ub294 \uadf8\ub808\uc774\ud305\uc758 \uc8fc\uae30\uc785\ub2c8\ub2e4.<\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

$\\\ub78c\ub2e4\/4$ \uc704\uc0c1 \uc2dc\ud504\ud2b8 \ubc0f \ubaa8\ub4dc \uc548\uc815\uc131<\/h3>\n\n\n\n

\uc644\ubcbd\ud558\uac8c \uade0\uc77c\ud55c \uaca9\uc790\ub294 \uc2e4\uc81c\ub85c \ube0c\ub798\uadf8 \uc8fc\ud30c\uc218\ub97c \uc911\uc2ec\uc73c\ub85c \ub300\uce6d\uc73c\ub85c \ubc30\uce58\ub41c \ub450 \uac00\uc9c0 \ubaa8\ub4dc\ub97c \uc9c0\uc6d0\ud569\ub2c8\ub2e4. \uc9c4\uc815\ud55c \ub2e8\uc77c \ubaa8\ub4dc \uc791\ub3d9\uc744 \ubcf4\uc7a5\ud558\uae30 \uc704\ud574 \ud558\uc774\uc5d4\ub4dc 1550nm DFB<\/strong> \uce69\uc740 \uaca9\uc790 \uc911\uc559\uc5d0 $\\\ub78c\ub2e4\/4$ \uc704\uc0c1 \ubcc0\uc774\ub97c \ud1b5\ud569\ud569\ub2c8\ub2e4. \uc774 \uc704\uc0c1 \uc774\ub3d9\uc740 \uc815\ud655\ud55c \ube0c\ub798\uadf8 \ud30c\uc7a5\uc5d0\uc11c \uacf5\uc9c4\uc744 \uc0dd\uc131\ud558\uc5ec \ub450 \ubc88\uc9f8 \ubaa8\ub4dc\ub97c \ud6a8\uacfc\uc801\uc73c\ub85c \uc5b5\uc81c\ud558\uace0 \uc885\uc885 45dB \ub610\ub294 50dB\ub97c \ucd08\uacfc\ud558\ub294 \uce21\uba74 \ubaa8\ub4dc \uc5b5\uc81c \ube44\uc728(SMSR)\uc744 \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc5d4\uc9c0\ub2c8\uc5b4\ub9c1 \uad00\uc810\uc5d0\uc11c \ubcfc \ub54c, \uc804\uc790\ube54 \ub9ac\uc18c\uadf8\ub798\ud53c \ub610\ub294 \ud640\ub85c\uadf8\ub7a8 \uac04\uc12d\uc744 \ud1b5\ud574 \uc81c\uc791\ub418\ub294 \uc774 \uaca9\uc790\uc758 \ud488\uc9c8\uc5d0 \ub530\ub77c \ub808\uc774\uc800\uc758 \u201c\uc120\ud3ed\u201d\uc774 \uacb0\uc815\ub429\ub2c8\ub2e4. \uc881\uc740 \uc120\ud3ed(\uc77c\ubc18\uc801\uc73c\ub85c \ud45c\uc900 DFB\uc758 \uacbd\uc6b0 1MHz \ubbf8\ub9cc, \ud558\uc774\uc5d4\ub4dc \ubcc0\ud615\uc758 \uacbd\uc6b0 100kHz \ubbf8\ub9cc)\uc740 \ube5b\uc758 \uc77c\uad00\uc131 \uae38\uc774\ub97c \uc9c1\uc811\uc801\uc73c\ub85c \uacb0\uc815\ud558\uae30 \ub54c\ubb38\uc5d0 \ud544\uc218\uc801\uc785\ub2c8\ub2e4. \uc13c\uc2f1\uc5d0\uc11c \uc120\ud3ed\uc774 \uc881\uc744\uc218\ub85d \uc2e0\ud638\uc758 \uc704\uc0c1 \uad00\uacc4\ub97c \uc783\uc9c0 \uc54a\uace0 \ud6e8\uc52c \ub354 \uba3c \uac70\ub9ac\uc5d0\uc11c \uce21\uc815\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc704\uc0c1 \ub178\uc774\uc988\uc640 \uc204\ub85c\uc6b0-\ud0c0\uc6b4\uc2a4 \ud55c\uacc4<\/h2>\n\n\n\n

\ub2e8\uc77c \uc8fc\ud30c\uc218\uc758 \uc120\ud3ed \uad11\uc12c\uc720 \uacb0\ud569 \ub808\uc774\uc800<\/a> \ub294 0\uc774 \uc544\ub2d9\ub2c8\ub2e4. \uc774\ub294 \uc704\uc0c1 \uc7a1\uc74c\uc5d0 \uc758\ud574 \uc81c\ud55c\ub418\uba70, \uc8fc\ub85c \uad11\uc790\uac00 \ub808\uc774\uc800 \ubaa8\ub4dc\ub85c \uc790\ubc1c\uc801\uc73c\ub85c \ubc29\ucd9c\ub418\uc5b4 \ubc1c\uc0dd\ud569\ub2c8\ub2e4. \uc774\ub294 \uc218\uc815\ub41c \uc204\ub85c\uc6b0-\ud0c0\uc6b4\uc2a4 \uacf5\uc2dd\uc73c\ub85c \uc124\uba85\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n\n\n\n

$$\\Delta \\nu = \\frac{h \\nu v_g^2 \\alpha_m \\alpha_{tot} (1 + \\alpha_H^2)}{4 \\pi P}$$<\/p>\n\n\n\n

\uc5ec\uae30\uc11c $\\alpha_H$\ub294 \uad74\uc808\ub960\uacfc \uce90\ub9ac\uc5b4 \ubc00\ub3c4 \ubcc0\ub3d9 \uac04\uc758 \uacb0\ud569\uc744 \uc124\uba85\ud558\ub294 \ud5e8\ub9ac \uc120\ud3ed \ud5a5\uc0c1 \uacc4\uc218\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc774 \uc120\ud3ed\uc744 \ucd5c\uc18c\ud654\ud558\uae30 \uc704\ud574 \uc81c\uc870\uc5c5\uccb4\ub294 $\\alpha_H$ \uacc4\uc218\ub97c \uc904\uc774\uae30 \uc704\ud574 InGaAsP\/InP \ub808\uc774\uc5b4\uc758 \u201c\ud000\ud140 \uc6f0\u201d \uc124\uacc4\ub97c \ucd5c\uc801\ud654\ud574\uc57c \ud569\ub2c8\ub2e4. \ub610\ud55c \uce90\ube44\ud2f0\uc758 \uc804\ub825 $P$\ub97c \ucd5c\ub300\ud654\ud574\uc57c \ud558\uc9c0\ub9cc, \uc804\ub825\uc774 \ub192\uc744\uc218\ub85d \uaca9\uc790 \uc804\uccb4\uc5d0 \uc5f4 \uacbd\uc0ac \uc704\ud5d8\uc774 \uc99d\uac00\ud558\uc5ec \uc8fc\ud30c\uc218 \u201c\ucc98\ud504\u201d \ub610\ub294 \ubaa8\ub4dc \ud638\ud551\uc774 \ubc1c\uc0dd\ud560 \uc218 \uc788\ub2e4\ub294 \uc0c1\ucda9 \uad00\uacc4\uac00 \ubc1c\uc0dd\ud569\ub2c8\ub2e4. \uadf8\ub807\uae30 \ub54c\ubb38\uc5d0 \uad11\uc12c\uc720 \uacb0\ud569 \ub808\uc774\uc800 \ubaa8\ub4c8<\/a><\/strong> \ub294 \ubc18\ub3c4\uccb4 \ubb3c\ub9ac\ud559\ub9cc\ud07c\uc774\ub098 \uc911\uc694\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

\uad6c\ud604: \ubc84\ud130\ud50c\ub77c\uc774 \ud328\ud0a4\uc9d5 \ubc0f \uad11\ud559 \uc808\uc5f0<\/h2>\n\n\n\n

DFB \uce69\uc774 \ud1b5\ud569\ub41c \uacbd\uc6b0 \uad11\uc12c\uc720 \uacb0\ud569\ud615 \uad11 \uc218\uc2e0\uae30<\/a><\/strong> \ub610\ub294 \uc1a1\uc2e0\uae30 \uc2dc\uc2a4\ud15c\uc5d0\uc11c \ud328\ud0a4\uc9d5\uc740 \uc18c\uc2a4\uc758 \uc2a4\ud399\ud2b8\ub7fc \ubb34\uacb0\uc131\uc744 \ubcf4\ud638\ud574\uc57c \ud569\ub2c8\ub2e4. 14\ud540 \ubc84\ud130\ud50c\ub77c\uc774 \ud328\ud0a4\uc9c0\ub294 \uc5ec\ub7ec \uac00\uc9c0 \uc774\uc720\ub85c DFB \ub808\uc774\uc800\uc758 \uc5c5\uacc4 \ud45c\uc900\uc785\ub2c8\ub2e4:<\/p>\n\n\n\n

    \n
  1. \uc5f4 \ud3c9\ud615:<\/strong> \ub0b4\ubd80 \uc5f4\uc804 \ub0c9\uac01\uae30(TEC)\ub294 \ubc00\ub9ac\ucf08\ube48 \ub2e8\uc704\uc758 \uc815\ubc00\ub3c4\ub85c \uce69 \uc628\ub3c4\ub97c \uc720\uc9c0\ud569\ub2c8\ub2e4. DFB \ub808\uc774\uc800\uc758 \ud30c\uc7a5\uc740 ~0.1nm\/\u00b0C\uae4c\uc9c0 \uc774\ub3d9\ud558\uae30 \ub54c\ubb38\uc5d0 \uc628\ub3c4 \uc548\uc815\uc131\uc774 \uc8fc\ud30c\uc218 \uc548\uc815\uc131\uc744 \ubcf4\uc7a5\ud558\ub294 \uc720\uc77c\ud55c \ubc29\ubc95\uc785\ub2c8\ub2e4.<\/li>\n\n\n\n
  2. \ubc31 \ub9ac\ud50c\ub809\uc158 \uad00\ub9ac:<\/strong> DFB \ub808\uc774\uc800\ub294 \uad11 \ud53c\ub4dc\ubc31\uc5d0 \ub9e4\uc6b0 \ubbfc\uac10\ud569\ub2c8\ub2e4. \uad11 \ucee4\ub125\ud130\uc5d0\uc11c -30dB\uc758 \ubc18\uc0ac\ub9cc \ubc1c\uc0dd\ud574\ub3c4 \ub0b4\ubd80 \uaca9\uc790\uac00 \ubd88\uc548\uc815\ud574\uc838 \uc120\ud3ed\uc774 \ub113\uc5b4\uc9c0\uac70\ub098 \uc8fc\ud30c\uc218\uac00 \ubd88\uc548\uc815\ud574\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc804\ubb38\uac00\uc6a9 DFB \ubaa8\ub4c8\uc740 \ub0b4\ubd80 \uad11 \uc544\uc774\uc194\ub808\uc774\ud130(\ubcf4\ud1b5 \uc774\uc911 \uc2a4\ud14c\uc774\uc9c0)\ub97c \ud1b5\ud569\ud558\uc5ec 40dB \uc774\uc0c1\uc758 \uc808\uc5f0\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/li>\n\n\n\n
  3. RF \uc784\ud53c\ub358\uc2a4 \ub9e4\uce6d:<\/strong> \uace0\uc18d \ubcc0\uc870(\ucd5c\ub300 10GHz \uc774\uc0c1)\uc758 \uacbd\uc6b0, \ud328\ud0a4\uc9c0\ub294 \u201c\uc9c0\ud130\u201d \ub610\ub294 \uc704\uc0c1 \uc7a1\uc74c\uc744 \uc720\ubc1c\ud560 \uc218 \uc788\ub294 \uc2e0\ud638 \ubc18\uc0ac\ub97c \ubc29\uc9c0\ud558\uae30 \uc704\ud574 50\uc634 \uc784\ud53c\ub358\uc2a4 \uc815\ud569\uc744 \uc81c\uacf5\ud574\uc57c \ud569\ub2c8\ub2e4.<\/li>\n<\/ol>\n\n\n\n

    \ucef4\ud3ec\ub10c\ud2b8 \ud488\uc9c8 \ub300 \uc2e0\ud638 \ubb34\uacb0\uc131: \ube44\uc6a9 \ubd84\uc11d<\/h2>\n\n\n\n

    DAS(\ubd84\uc0b0 \uc74c\ud5a5 \uac10\uc9c0) \uc2dc\uc7a5\uc5d0\uc11c\ub294 \uc881\uc740 \uc120\ud3ed \ub808\uc774\uc800 \ub2e4\uc774\uc624\ub4dc<\/a><\/strong> \ub294 \uc885\uc885 \uc778\ud130\ub85c\uac8c\uc774\ud130 \uc7a5\uce58\uc5d0\uc11c \uac00\uc7a5 \ube44\uc2fc \ub2e8\uc77c \uad6c\uc131 \uc694\uc18c\uc785\ub2c8\ub2e4. \uc2dc\uc2a4\ud15c \ud1b5\ud569\uc5c5\uccb4\ub294 \ub354 \uc800\ub834\ud55c DFB \ubaa8\ub4c8\uc744 \uc870\ub2ec\ud558\uace0 \uc2f6\uc740 \uc720\ud639\uc744 \ub290\ub084 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \u201c\ud488\uc9c8 \ube44\uc6a9'\uc740 \ucd5c\uc885 \uc2dc\uc2a4\ud15c\uc758 \uc2e0\ud638 \ub300 \uc7a1\uc74c\ube44(SNR)\uc5d0\uc11c \ub4dc\ub7ec\ub0a9\ub2c8\ub2e4.<\/p>\n\n\n\n

    \uc800\uac00\uc758 DFB \ub808\uc774\uc800\ub294 \uc120\ud3ed\uc774 5MHz\uc774\uace0 SMSR\uc774 35dB\uc77c \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub294 \uae30\ubcf8\uc801\uc778 \ub370\uc774\ud130 \uc804\uc1a1\uc5d0\ub294 \ucda9\ubd84\ud574 \ubcf4\uc774\uc9c0\ub9cc \ud30c\uc774\ud504\ub77c\uc778 \ubaa8\ub2c8\ud130\ub9c1\uc5d0 \uc0ac\uc6a9\ub418\ub294 DAS \uc2dc\uc2a4\ud15c\uc5d0\uc11c \uc774 5MHz \uc120\ud3ed\uc740 \ub192\uc740 \u201c\uc704\uc0c1 \ub178\uc774\uc988 \ud50c\ub85c\uc5b4\u201d\ub97c \ucd08\ub798\ud569\ub2c8\ub2e4. \uc774 \ub178\uc774\uc988\ub294 \ub204\uc218 \ub610\ub294 \uc81c3\uc790\uc758 \uce68\uc785\uc73c\ub85c \uc778\ud55c \ubbf8\uc138\ud55c \uc74c\ud5a5 \uc9c4\ub3d9\uc744 \uac00\ub9bd\ub2c8\ub2e4. \uc5f4\uc545\ud55c \ub808\uc774\uc800\ub97c \ubcf4\uc644\ud558\uae30 \uc704\ud574 \uc2dc\uc2a4\ud15c \uac1c\ubc1c\uc790\ub294 \ub354 \ube44\uc2fc \uc800\uc7a1\uc74c \uc99d\ud3ed\uae30\uc640 \ubcf5\uc7a1\ud55c \ub514\uc9c0\ud138 \uc2e0\ud638 \ucc98\ub9ac(DSP) \uc54c\uace0\ub9ac\uc998\uc5d0 \ud22c\uc790\ud574\uc57c \ud569\ub2c8\ub2e4. \ubc18\uba74, \uc704\uc0c1 \ub178\uc774\uc988\uac00 \uc801\uc740 \ud504\ub9ac\ubbf8\uc5c4 \ub808\uc774\uc800\ub85c \uc2dc\uc791\ud558\uba74 1550nm DFB \ub808\uc774\uc800<\/strong> \ub294 \ub2e4\uc6b4\uc2a4\ud2b8\ub9bc \uc804\uc790 \uc7a5\uce58\ub97c \ud06c\uac8c \uac04\uc18c\ud654\ud558\uace0 \uc2dc\uc2a4\ud15c\uc758 \u201c\uac10\uc9c0 \ud655\ub960'\uc744 \ud5a5\uc0c1\uc2dc\ucf1c \uad81\uadf9\uc801\uc73c\ub85c \uc13c\uc11c \ub124\ud2b8\uc6cc\ud06c\uc758 \ucd1d \ube44\uc6a9\uc744 \ub0ae\ucda5\ub2c8\ub2e4.<\/p>\n\n\n\n

    \uc0ac\ub840 \uc5f0\uad6c: \ud574\uc800 \uc804\ub825 \ucf00\uc774\ube14 \ubaa8\ub2c8\ud130\ub9c1\uc744 \uc704\ud55c DAS<\/h2>\n\n\n\n

    \uace0\uac1d \ubc30\uacbd:<\/p>\n\n\n\n

    \ud55c \ud574\uc0c1 \ud48d\ub825 \ubc1c\uc804\uc18c \uc6b4\uc601\uc790\ub294 50\ud0ac\ub85c\ubbf8\ud130\uc5d0 \ub2ec\ud558\ub294 \ud574\uc800 \uace0\uc555 \uc804\ub825 \ucf00\uc774\ube14\uc758 \ubb34\uacb0\uc131\uc744 \ubaa8\ub2c8\ud130\ub9c1\ud558\uae30 \uc704\ud574 \ubd84\uc0b0 \uc74c\ud5a5 \uac10\uc9c0(DAS) \uc2dc\uc2a4\ud15c\uc774 \ud544\uc694\ud588\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

    \uae30\uc220\uc801 \uacfc\uc81c:<\/p>\n\n\n\n

    \uac00\uc7a5 \ud070 \ubb38\uc81c\ub294 \ud6c4\ubc29 \uc0b0\ub780\ub41c \ub808\uc774\ub9ac \uc2e0\ud638\uc758 \uac10\uc1e0\uc600\uc2b5\ub2c8\ub2e4. 50km\uac00 \ub118\uc73c\uba74 \uad11\uc12c\uc720 \uacb0\ud569 \uad11 \uc218\uc2e0\uae30\ub85c \ub3cc\uc544\uc624\ub294 \uc2e0\ud638\uac00 \uc5c4\uccad\ub098\uac8c \uc57d\ud574\uc9d1\ub2c8\ub2e4.<\/p>\n\n\n\n