{"id":433868,"date":"2025-06-11T14:21:49","date_gmt":"2025-06-11T14:21:49","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/coherent-beam-combination-at-far-field-using-four-gaussian-laser-sources\/"},"modified":"2025-06-11T14:21:49","modified_gmt":"2025-06-11T14:21:49","slug":"coherent-beam-combination-at-far-field-using-four-gaussian-laser-sources","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/coherent-beam-combination-at-far-field-using-four-gaussian-laser-sources\/","title":{"rendered":"Coherent beam combination at far field using four Gaussian laser sources"},"content":{"rendered":"<p>&lt;p data-start=&#8221;66&#8243; data-end=&#8221;381&#8243;&gt;I&rsquo;m trying to design a 4-beam Coherent Beam Combining (CBC) system, where the beams coherently combine at a far-field location to form a diffraction-limited spot (as shown below). I&#8217;m using a DLL Source with Gaussian beams and a detector at the target, but I&rsquo;m not seeing a diffraction-limited spot at the target.&lt;\/p&gt;&lt;p data-start=&#8221;383&#8243; data-end=&#8221;512&#8243;&gt;Can someone help me troubleshoot this? Do I need to include a lens or some other optical element to achieve the desired focusing?&lt;\/p&gt;&lt;p data-start=&#8221;383&#8243; data-end=&#8221;512&#8243;&gt;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/06\/11-06-2025-1749651583-mceclip1.png\" width=\"840\" height=\"402\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-433868","topic","type-topic","status-publish","hentry","topic-tag-coherence","topic-tag-diffraction-1","topic-tag-diffractive-optics","topic-tag-interference"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27816"],"_bbp_topic_id":["433868"],"_bbp_subscription":["541976","50911","540424"],"_bbp_author_ip":["103.232.241.182"],"_bbp_last_reply_id":["436500"],"_bbp_last_active_id":["436500"],"_bbp_last_active_time":["2025-07-10 12:35:30"],"_bbp_reply_count":["2"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["3"],"_bbp_engagement":["541976","50911","540424"],"_btv_view_count":["167"],"_bbp_topic_status":["unanswered"],"_bbp_notification_enabled":["540424"]},"test":"krmukesh94gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/433868","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/433868\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=433868"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}