{"id":2107,"date":"2016-11-28T14:16:00","date_gmt":"2016-11-28T12:16:00","guid":{"rendered":"https:\/\/stwww1.weizmann.ac.il\/lasers\/?p=2107"},"modified":"2017-07-30T11:14:34","modified_gmt":"2017-07-30T08:14:34","slug":"%d7%98%d7%95%d7%95%d7%97-%d7%a8%d7%99%d7%99%d7%9c%d7%99","status":"publish","type":"post","link":"https:\/\/stwww1.weizmann.ac.il\/lasers\/?p=2107","title":{"rendered":"\u05d8\u05d5\u05d5\u05d7 \u05e8\u05d9\u05d9\u05dc\u05d9"},"content":{"rendered":"<p>\u05de\u05d2\u05d3\u05d9\u05e8\u05d9\u05dd \u05de\u05e8\u05d7\u05e7 <span style=\"color: #800080\"><strong>z<sub>0<\/sub><\/strong><\/span>, \u05d4\u05e0\u05e7\u05e8\u05d0 <strong><span style=\"color: #804000\">\u05d8\u05d5\u05d5\u05d7 \u05e8\u05d9\u05d9\u05dc\u05d9<\/span><\/strong> (\u05e8\u05d0\u05d4 \u05d0\u05d9\u05d5\u05e8 7.8), <span style=\"color: #800080\"><strong>\u05db\u05de\u05e8\u05d7\u05e7 \u05de\u05e0\u05e7\u05d5\u05d3\u05ea \u05de\u05d5\u05ea\u05df \u05d4\u05d0\u05dc\u05d5\u05de\u05d4 \u05e2\u05d3 \u05dc\u05e0\u05e7\u05d5\u05d3\u05d4 \u05d1\u05d4 \u05de\u05d5\u05db\u05e4\u05dc \u05e9\u05d8\u05d7 \u05d4\u05d0\u05dc\u05d5\u05de\u05d4<\/strong><\/span>.<\/p>\n<p><img decoding=\"async\" class=\"size-medium wp-image-2110 aligncenter\" src=\"https:\/\/stwww1.weizmann.ac.il\/lasers\/wp-content\/uploads\/sites\/25\/2016\/11\/7-8-300x131.gif\" alt=\"\u05d8\u05d5\u05d5\u05d7 \u05e8\u05d9\u05d9\u05dc\u05d9\" width=\"300\" height=\"131\" \/><\/p>\n<p style=\"text-align: center\"><strong>\u05d0\u05d9\u05d5\u05e8 7.8: \u05d8\u05d5\u05d5\u05d7 \u05e8\u05d9\u05d9\u05dc\u05d9<\/strong><\/p>\n<p>\u05db\u05dc\u05d5\u05de\u05e8 \u05d6\u05d4\u05d5 <span style=\"color: #800080\"><strong>\u05d4\u05de\u05e8\u05d7\u05e7 \u05d1\u05d5 \u05d2\u05d3\u05dc \u05e8\u05d3\u05d9\u05d5\u05e1 \u05d0\u05dc\u05d5\u05de\u05ea \u05d4\u05e7\u05e8\u05d9\u05e0\u05d4 Wz \u05e4\u05d9 <img decoding=\"async\" class=\"alignnone size-full wp-image-2111\" src=\"https:\/\/stwww1.weizmann.ac.il\/lasers\/wp-content\/uploads\/sites\/25\/2016\/11\/Image149.gif\" alt=\"\u05e9\u05d5\u05e8\u05e9 \u05e9\u05dc 2\" width=\"20\" height=\"29\" \/>\u00a0\u05de\u05e8\u05d3\u05d9\u05d5\u05e1 \u05d4\u05d0\u05dc\u05d5\u05de\u05d4 \u05d1\u05de\u05d5\u05ea\u05df W<sub>0<\/sub><\/strong><\/span>:<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-2112 size-full\" src=\"https:\/\/stwww1.weizmann.ac.il\/lasers\/wp-content\/uploads\/sites\/25\/2016\/11\/E7s2-6.gif\" alt=\"Z_{0}=\\frac{\\pi \\cdot w_{0}^{2}\\cdot n}{\\lambda }\" width=\"114\" height=\"50\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-2113 size-full\" src=\"https:\/\/stwww1.weizmann.ac.il\/lasers\/wp-content\/uploads\/sites\/25\/2016\/11\/E7s2-7.gif\" alt=\"W(Z_{n})=\\sqrt{2}\\cdot W_{0}\" width=\"127\" height=\"29\" \/><\/p>\n<p><strong>n<\/strong> = \u05de\u05e7\u05d3\u05dd \u05d4\u05e9\u05d1\u05d9\u05e8\u05d4 \u05e9\u05dc \u05d4\u05ea\u05d5\u05d5\u05da.<\/p>\n<p>\u05d1\u05d0\u05de\u05e6\u05e2\u05d5\u05ea <strong>z<sub>0<\/sub><\/strong>, \u05e0\u05d9\u05ea\u05df \u05dc\u05de\u05e6\u05d5\u05d0 \u05d0\u05ea \u05e8\u05d3\u05d9\u05d5\u05e1 \u05d4\u05d0\u05dc\u05d5\u05de\u05d4 \u05d1\u05de\u05e8\u05d7\u05e7 z \u05db\u05dc\u05e9\u05d4\u05d5:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-2114 size-full\" src=\"https:\/\/stwww1.weizmann.ac.il\/lasers\/wp-content\/uploads\/sites\/25\/2016\/11\/E7s2-8.gif\" alt=\"W^{2}(z)=W0(1+\\frac{z^{2}}{z_{0}^{2}})\" width=\"199\" height=\"53\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-2115 size-medium\" src=\"https:\/\/stwww1.weizmann.ac.il\/lasers\/wp-content\/uploads\/sites\/25\/2016\/11\/E7s2-9-300x49.gif\" alt=\"W(z)=W0\\sqrt{(1+\\frac{z^{2}}{z_{0}^{2}})}=W0(1+\\frac{z^{2}}{z_{0}^{2}})^{\\frac{1}{2}}=W0(1+\\frac{z^{2}}{2z_{0}^{2}})\" width=\"300\" height=\"49\" \/><\/p>\n<p>\u05d1\u05e9\u05dc\u05d1 \u05d4\u05d0\u05d7\u05e8\u05d5\u05df \u05e9\u05dc \u05d4\u05d7\u05d9\u05e9\u05d5\u05d1 \u05e0\u05e2\u05d6\u05e8\u05e0\u05d5 \u05d1\u05e4\u05d9\u05ea\u05d5\u05d7 \u05dc\u05d8\u05d5\u05e8 \u05d8\u05d9\u05d9\u05dc\u05d5\u05e8 \u05e2\u05dc-\u05e4\u05d9:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-2116 size-full\" src=\"https:\/\/stwww1.weizmann.ac.il\/lasers\/wp-content\/uploads\/sites\/25\/2016\/11\/E7s2-10.gif\" alt=\"(1+x^{2})^{\\frac{1}{2}}=1+\\frac{x^{2}}{2}\" width=\"169\" height=\"66\" \/><\/p>\n<p>\u05e7\u05d9\u05d1\u05dc\u05e0\u05d5 \u05d1\u05e7\u05d9\u05e8\u05d5\u05d1 \u05e8\u05d0\u05e9\u05d5\u05df \u05e2\u05d1\u05d5\u05e8 z &gt;&gt; z<sub>0<\/sub>:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-2117 size-full\" src=\"https:\/\/stwww1.weizmann.ac.il\/lasers\/wp-content\/uploads\/sites\/25\/2016\/11\/E7s2-11.gif\" alt=\"W(z)=W_{0}\\cdot (\\frac{z}{z_{n}})\" width=\"146\" height=\"39\" \/><\/p>\n<p>\u05db\u05dc\u05d5\u05de\u05e8, <span style=\"color: #804000\"><strong>\u05d1\u05de\u05e8\u05d7\u05e7 (z) \u05d2\u05d3\u05d5\u05dc \u05de\u05de\u05d5\u05ea\u05df \u05d4\u05d0\u05dc\u05d5\u05de\u05d4, \u05e0\u05d9\u05ea\u05df \u05dc\u05e7\u05e8\u05d1 \u05d0\u05ea \u05d4\u05ea\u05e0\u05d4\u05d2\u05d5\u05ea \u05e8\u05d3\u05d9\u05d5\u05e1 \u05d4\u05d0\u05dc\u05d5\u05de\u05d4 W \u05db\u05d2\u05d9\u05d3\u05d5\u05dc \u05dc\u05d9\u05e0\u05d0\u05e8\u05d9 \u05e2\u05dd z<\/strong><\/span>.<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/stwww1.weizmann.ac.il\/lasers\/?p=2120\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-49\" src=\"https:\/\/stwww1.weizmann.ac.il\/lasers\/wp-content\/uploads\/sites\/25\/2016\/10\/Buttons_Previous5bCircle5d.png\" alt=\"\u05db\u05e4\u05ea\u05d5\u05e8 &quot;\u05d4\u05e7\u05d5\u05d3\u05dd&quot;\" width=\"148\" height=\"54\" \/><\/a> <a href=\"https:\/\/stwww1.weizmann.ac.il\/lasers\/?p=2094\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-48 alignleft\" src=\"https:\/\/stwww1.weizmann.ac.il\/lasers\/wp-content\/uploads\/sites\/25\/2016\/10\/Buttons_Next-5bSquare5d.png\" alt=\"\u05db\u05e4\u05ea\u05d5\u05e8 &quot;\u05d4\u05d1\u05d0&quot;\" width=\"148\" height=\"54\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u05de\u05d2\u05d3\u05d9\u05e8\u05d9\u05dd \u05de\u05e8\u05d7\u05e7 z0, \u05d4\u05e0\u05e7\u05e8\u05d0 \u05d8\u05d5\u05d5\u05d7 \u05e8\u05d9\u05d9\u05dc\u05d9 (\u05e8\u05d0\u05d4 \u05d0\u05d9\u05d5\u05e8 7.8), \u05db\u05de\u05e8\u05d7\u05e7 \u05de\u05e0\u05e7\u05d5\u05d3\u05ea \u05de\u05d5\u05ea\u05df \u05d4\u05d0\u05dc\u05d5\u05de\u05d4 \u05e2\u05d3 \u05dc\u05e0\u05e7\u05d5\u05d3\u05d4 \u05d1\u05d4 \u05de\u05d5\u05db\u05e4\u05dc \u05e9\u05d8\u05d7 \u05d4\u05d0\u05dc\u05d5\u05de\u05d4. \u05d0\u05d9\u05d5\u05e8 7.8: \u05d8\u05d5\u05d5\u05d7 \u05e8\u05d9\u05d9\u05dc\u05d9 \u05db\u05dc\u05d5\u05de\u05e8 \u05d6\u05d4\u05d5 \u05d4\u05de\u05e8\u05d7\u05e7 \u05d1\u05d5 \u05d2\u05d3\u05dc \u05e8\u05d3\u05d9\u05d5\u05e1 \u05d0\u05dc\u05d5\u05de\u05ea \u05d4\u05e7\u05e8\u05d9\u05e0\u05d4 Wz \u05e4\u05d9 \u00a0\u05de\u05e8\u05d3\u05d9\u05d5\u05e1 \u05d4\u05d0\u05dc\u05d5\u05de\u05d4 \u05d1\u05de\u05d5\u05ea\u05df W0: n = \u05de\u05e7\u05d3\u05dd &hellip; <a href=\"https:\/\/stwww1.weizmann.ac.il\/lasers\/?p=2107\">\u05dc\u05d4\u05de\u05e9\u05da \u05e7\u05e8\u05d9\u05d0\u05d4  <span class=\"meta-nav\">&larr;<\/span><\/a><\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[51],"tags":[],"class_list":["post-2107","post","type-post","status-publish","format-standard","hentry","category-7-2-----"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/stwww1.weizmann.ac.il\/lasers\/index.php?rest_route=\/wp\/v2\/posts\/2107"}],"collection":[{"href":"https:\/\/stwww1.weizmann.ac.il\/lasers\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/stwww1.weizmann.ac.il\/lasers\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/stwww1.weizmann.ac.il\/lasers\/index.php?rest_route=\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/stwww1.weizmann.ac.il\/lasers\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2107"}],"version-history":[{"count":6,"href":"https:\/\/stwww1.weizmann.ac.il\/lasers\/index.php?rest_route=\/wp\/v2\/posts\/2107\/revisions"}],"predecessor-version":[{"id":5683,"href":"https:\/\/stwww1.weizmann.ac.il\/lasers\/index.php?rest_route=\/wp\/v2\/posts\/2107\/revisions\/5683"}],"wp:attachment":[{"href":"https:\/\/stwww1.weizmann.ac.il\/lasers\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2107"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/stwww1.weizmann.ac.il\/lasers\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2107"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stwww1.weizmann.ac.il\/lasers\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2107"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}