Measurement of energy density and duration of ultrashort incoherent light pulses with the aid of liquid crystals

✍ Scribed by Nelson V. Tabiryan; Cesare Umeton

• Book ID: 104161264
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 109 KB
• Volume: 175
• Category: Article
• ISSN: 0030-4018
• DOI: 10.1016/s0030-4018(99)00748-8

✦ Synopsis

We discuss new possibilities for the measurement of short laser pulses with the aid of liquid crystals: the competingly Ž . Ž . acting waves CAW method and the linear-optical pulse overlap LOPO method. CAW is a non-interferometric method providing both the peak energy density of a pulse and its duration in a simple, single shot measurement. LOPO allows measurement of ultra-short pulse duration with no need for nonlinear optical materials and phenomena. We also show the possibility of utilising the electrically controlled birefringence of liquid crystals to replace the opto-mechanical delay lines.