v2.4.0.8
Document and Entity Information Document
6 Months Ended
Oct. 27, 2013
Nov. 29, 2013
Entity Information [Line Items]    
Entity Registrant Name FINISAR CORP  
Entity Central Index Key 0001094739  
Current Fiscal Year End Date --04-27  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Oct. 27, 2013  
Document Fiscal Year Focus 2014  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   96,128,666