أرسل هذا في رسالة قصيرة: Relative phase noise induced impairment in M-ary phase-shift-keying coherent optical communication system using distributed fiber Raman amplifier

 _    _      ___    __    __     ___     _____    
| || | ||   / _ \\  \ \\ / //   / _ \\  |  __ \\  
| || | ||  / //\ \\  \ \/ //   / //\ \\ | |  \ || 
| \\_/ || |  ___  ||  \  //   |  ___  ||| |__/ || 
 \____//  |_||  |_||   \//    |_||  |_|||_____//  
  `---`   `-`   `-`     `     `-`   `-`  -----`