We describe a novel chaotic macropulse green laser designed employing the pulse modulation of a 520 nm laser diode with optical feedback. We analyze the characteristics of these chaotic macropulses, in view of effects of the feedback intensity, injection current, modulation voltage, duty cycle, and modulation frequency on the pulses, including their full width at half maximum (FWHM) values and peak side-lobe levels (PSLs). We determine an optimum feedback intensity of 11.7% based on the maximum peak optical power and the scope of the amplitude jitter of the chaotic macropulse. The optimum injection currents are approximately between 60 and 70 mA, and the modulation voltages between 2.0 and 3.0 V are limited by the radio-frequency (RF) power. We found that chaos also occurred at the bottom of the macropulse when the duty cycle was less than approximately 30%. The modulation frequencies were loaded from 4 to 20 MHz; this range was restricted by the performance of the RF input port on the laser diode mount. The range resolution of the chaotic macropulses is approximately 3 cm in seawater; it is achieved with lower power consumption than a continuous wave chaotic laser.

我们描述了一种新颖的混沌大脉冲绿色激光器，该激光器采用具有光反馈的520 nm激光二极管的脉冲调制设计而成。考虑到反馈强度，注入电流，调制电压，占空比和调制频率对脉冲的影响，包括其半峰全宽（FWHM）值和峰值旁瓣，我们分析了这些混沌大脉冲的特性级别（PSL）。根据最大峰值光功率和混沌大脉冲幅度抖动的范围，我们确定最佳反馈强度为11.7％。最佳注入电流大约在60到70 mA之间，而2.0到3.0 V之间的调制电压受到射频（RF）功率的限制。我们发现，当占空比小于大约30％时，在大脉冲的底部也会发生混乱。调制频率从4到20 MHz加载；该范围受到激光二极管安装座上RF输入端口性能的限制。海水中混沌大脉冲的距离分辨率大约为3 cm。它比连续波混沌激光器具有更低的功耗。