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

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Text this: Investigation of PMD in direct-detection optical OFDM with zero padding