أرسل هذا في رسالة قصيرة: Spectral narrowing and locking of a vertical external-cavity surface-emitting laser using an intracavity volume Bragg grating

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