Use of commercial grade light emitting diode in auto-correlation measurements of femtosecond and picosecond laser pulses at 1054 nm

被引：10

作者：

Sharma, AK ^{[1
]}

Raghuramaiah, M ^{[1
]}

Naik, PA ^{[1
]}

Gupta, PD ^{[1
]}

机构：

[1] Ctr Adv Technol, Laser Plasma Div, Indore 452013, India

来源：

OPTICS COMMUNICATIONS | 2005年 / 246卷 / 1-3期

关键词：

ultrafast pulse generation and characterization; multi-photon absorption; auto-correlation signals; light emitting diodes; frequency chirp;

D O I：

10.1016/j.optcom.2004.10.067

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Commercial grade AlGaAs based light emitting diodes (LEDs) have been characterized at 1054 nm for their nonlinear photoconductivity and effect of aging and used as a two-photon detector to record auto-correlation signals of ultra-short laser pulses. The lifetime of these LEDs is found to be similar to6 x 10(11) and similar to2 x 10(11) laser pulses at an average incident power level of 20 and 60 mW of 200 fs laser pulses, respectively. These LEDs have been used for real time recording of interferometric auto-correlation (IAC) to determine pulse duration and sensitive detection of the frequency chirp of 200 fs laser pulses. A twofold enhancement in sensitivity of new modified signal, derived from the envelope functions of IAC signal, has been achieved. The suitability of these LEDs to record intensity auto-correlation in multi-picosecond regime is also demonstrated using 30ps laser pulses from an Nd:YLF oscillator. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：195 / 204

页数：10

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