光输出反馈损耗调制型双稳激光器特性与器件参量之间的关系

报导了光输出反馈损耗调制型双稳Ａｒ离子激光器的实验结果，激光谐振腔内放置一个用作损耗调制器的的电光晶体ＬｉＮｂＯ３。利用光探测器的非线性饱和特性控制腔内损耗，器件的双稳特性随各参量（激光输出到光探测器的反馈系数η、反馈损耗调制系数Ｂ、光探测器的饱和光强ＩＤ，输入光信号强度Ｉ以及激光器的泵浦电流ｉＡ）变化的规律，与半经典理论计算的结果完全一致。     

光输出反馈损耗调制型双稳激光器的半经典理论

利用半经典激光方程求出了光输出反馈损耗调制型双稳激光器的稳态解。进行了解的线性稳定性分析。理论计算表明,按这种方式运转的激光器的双稳特性与激光器的泵浦强度、光输出反馈系数、反馈损耗调制系数、输入光信号强度以及光电探测器的饱和光强有关。该器件是一种可在较大范围内调节和控制的主动式光学双稳器件。适当选择反馈损耗调制系效和光电探测器的饱和光强,该器件还可工作在自脉冲状态,从而有可能利用这种运转方式获得超短激光脉冲。     

与光探测器单片集成双稳半导体激光器的特性

利用光输出反馈泵浦方式,首次观测到PD/LD单片集成型光学双稳态。电路简单、稳定性好;双稳范围的宽度可根据需要在很大范围内调节。利用半导体激光器的速率方程理论计算了这类双稳激光器的稳态行为,发现实验结果和理论计算符合的很好。     

半导体激光器光电混合双稳装置的双稳特性与器件参量之间的关系

报导了输出反馈泵浦型双稳半导体激光器双稳物性随器件参量变化的实验结果，双稳实验曲线和理论计算曲线的对比分析表明，双稳特性随各参量变化规律安全相同，实验和理论之间的微小差别来源于光探测器的实测饱和曲线和理论模型之间的差异，以及实际的半导体激光器存在自发辐射。     

集成双稳半导体激光器输出光强的线性稳定性分析

从速率方程出发,利用线性稳定性分析方法,分析了单片集成双稳半导体激光器输出光强的稳定性。结果表明此类双稳半导体激光器具有很大的双稳范围。     

GaAs我子诱导光吸收对调Q激光器脉冲的影响

研究了利用ＧａＡｓ的双光子诱导吸收实现调Ｑ激光脉冲展宽的原理,分析了ＧａＡｓ的光吸收特性,建立了激光器速率方程并给出了数值解。在实验上,将ＧａＡｓ薄片放入一电光调ＱＮｄ：ＹＡＧ激光器谐振腔中,同理论预测一样,激光输出脉冲的能量、峰值功率都低于常规调Ｑ激光脉冲,同时脉冲宽度得到了展宽。     

GaAs／GaAlAs多量子阱CCTS结构双稳态激光器的实验研究

本文报道了ＧａＡｓ／ＧａＡｌＡｓ多量子阱（ＭＱＷ）双区共腔（ＣＣＴＳ）结构的双稳态激光器．该器件利用多次离子注入形成电隔离很好的双电极结构，吸收区上加上一定反偏电压时得到了双稳特性，观察到了器件工作于双稳态时对光谱边模的显著抑制．     

用于氦原子泵浦的1080nm半导体激光器

ＩｎＧａＡｓ／ＧａＡｓ 应变量子结构半导体激光器有其特有的波长输出范围,介绍了１ ０８０ ｎｍ ＩｎＧａＡｓ／ＧａＡｓ 应变量子阱激光器的结构、典型的特性参数及其用途。     

射频电视信号对半导体激光的频率调制

本文报道射频电视信号对ＧａＡｌＡｓ双异质半导体激光的频率调制。使用自研制由两个Ｆａｒｂｒｙ－Ｐｅｒｏｔ腔组成的高分辨率光谱测量系统，当用射频电视信号调制半导体激光器的电流时，成功地测量到输出激光的调制边带。文中提出一个简单的模型：将半导体激光器看成一个充满介质的Ｆ－Ｐ腔，介质内部电流受调制时，腔的谐振频率可写成调制电流的函数，进而以此模型说明实验结果。     

基于MBE的GaAlAs／GaAs分布反馈式半导体激光器的制作新工艺

利用分子束外延（ＭＢＥ）对ＧａＡＩＡｓ和ＧａＡｓ的选择性热蚀特性进行光栅上的二次外延生长，既能获得清洁的外延界面，又能精确控制光栅的形状．采用这种方法，我们在国际上首次成功地制作了完全ＭＢＥ生长的内含吸收光栅的ＧａＡｌＡｓ／ＧａＡｓ多量子阱增益耦合型分布反馈式（ＤＦＢ）半导体激光器．并实现了激光器在室温下的脉冲激射，、器件表现出了ＤＦＢ模式的单模工作特性．     

Control of unidirectional oscillation in semiconductor orbiterlasers

Unidirectional oscillation in a ring-resonator-type semiconductor laser was demonstrated in a square-shaped orbiter laser using an optical feedback mechanism. The bistable switching phenomenon between the unidirectional and bidirectional oscillation was observed synchronized with the switching of the longitudinal lasing mode. A longitudinal-mode bistability results from the compound cavity system formed by the orbiter laser and output waveguide. The feedback light from the output waveguide end interferes with the orbiter lasing light. Switching between the unidirectional and bidirectional oscillation was controlled by injecting a current into the output waveguide, which varies the phase condition of the feedback light     

Optical bistability in a traveling-wave SOA connected to a DFB laser diode: theory and experiment

We investigate the bistable response of a traveling-wave semiconductor optical amplifier (SOA) connected bidirectionally to a distributed feedback (DFB) laser diode. By contrast to dispersive DFB amplifiers, bistability is possible for a broad wavelength range of the injected optical signal. A theoretical analysis clarifies the origin of the phenomenon and the conditions under which it occurs. Numerical simulations and experimental results confirm the theoretical analysis. Experimentally obtained step heights up to 25 dB and widths of the bistability domain of 1-4 dB have been found.     

半导体激光器的光学可双稳静态工作特性的分析

本文给出了半导体激光器光学可双稳静态特性的分析。使用电子和光子密度的非线性速率方程,得到了光学可双稳半导体激光二极管(BILD)光输出的一种简单模型。该模型强调物理机制以及和双稳性有关的参数给出了态方程,并解释了BILD的主要特征。在P_oP_i特性中具有很大滞后回线的双稳性是BILD的突出特点。     

Optical spectral bistability in a semiconductor fiber ring laserthrough gain saturation in an SOA

We demonstrate the operation of optical bistability in a widely tunable semiconductor fiber ring laser, using a semiconductor optical amplifier (SOA). The laser can be operated in two bistable states: the spectrum of the first state has one main lasing peak with very narrow linewidth, and the second state has simultaneous oscillation of two main peaks at different wavelengths. The two bistable states can be switched to each other using either electrical or optical methods. We further explain the bistable operation using the theory of two-mode competition through gain saturation in the SOA     

非均匀分布反馈半导体光放大器的动态双稳特性

分布反馈半导体光放大器(DFB-SOAs)具有较低的双稳上跳阈值，因而在光学信息处理方面有一定的应用前景。引入空间相移、啁啾等非均匀性后，其双稳特性可得到进一步改善。由于系统的传输速率受到脉冲下降沿形变及开启延时的限制，因此对其动态双稳特性的研究很有必要。从耦合模方程及载流子速率方程出发，数值分析了相移、啁啾分布反馈半导体光放大器的动态双稳特性。结果表明，相移使出射脉冲下降沿的形变及开启延迟随初始失谐量的减小呈现先恶化后缓和的趋势，引入啁啾可明显抑制脉冲下降沿的形变，但是增加了开启延迟所需的功率过载量。     

Effect of chirped gratings on reflective optical bistability in DFBsemiconductor laser amplifiers

We use spatial chirp of the built-in grating to improve optical bistability on reflection from distributed feedback semiconductor laser amplifiers. We show that improvements in the on-off switching ratio occur because spatial chirp greatly affects the saturation behavior of the reflectivity resonances, allowing access to states of low reflection during bistable switching. We also show that spatial chirp modifies the spectral range of the variety of hysteresis shapes that occur on reflection. In doing so, we discover a new type of hysteresis loop that reveals a qualitative difference between the loop-shaped hystereses occurring near the two edges of the stop band. With spatial chirp, the new hysteresis loop can exhibit an on-off switching ratio in excess of 100000