排序方式: 共有40条查询结果,搜索用时 15 毫秒
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提出了一种用于单纵模激光器选模的基于光纤耦合器的光纤复合环腔(CRC)滤波器的仿真方法,利用该方法对两种新型双耦合器双环CRC(DCDR-CRC)滤波器及三耦合器双环CRC(TCDR-CRC)滤波器进行了理论仿真,通过引入游标原理,分析了两种滤波器在不同环长差下的滤波特性,并通过调整DCDR-CRC及TCDR-CRC的耦合比、环长及环长差,对有效自由光谱范围(FSR)、抑制比(SR)及主透射峰带宽进行优化,计算结果表明优化后环腔的有效FSR可有效抑制波长选择器传输通带内的增益竞争,较低的SR可以抑制CRC滤波器相邻透射峰之间的增益竞争,较窄的主透射峰可以保证仅有一个激光器的纵模被选择。 相似文献
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Stable single longitudinal mode erbium-doped silica fiber laser based on an asymmetric linear three-cavity structure
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We present a stable linear-cavity single longitudinal mode (SLM) erbium-doped silica fiber laser. It consists of four fiber Bragg gratings (FBGs) directly written in a section of photosensitive erbium-doped fiber (EDF) to form an asymmetric three-cavity structure. The stable SLM operation at a wavelength of 1545.112 nm with a 3-dB bandwidth of 0.012 nm and an optical signal-to-noise ratio (OSNR) of about 60 dB is verified experimentally. Under laboratory conditions, the performance of a power fluctuation of less than 0.05 dB observed from the power meter for 6 h and a wavelength variation of less than 0.01 nm obtained from the optical spectrum analyzer (OSA) for about 1.5 h are demonstrated. The gain fiber length is no longer limited to only several centimeters for SLM operation because of the excellent mode-selecting ability of the asymmetric three-cavity structure. The proposed scheme provides a simple and cost-effective approach to realizing a stable SLM fiber laser. 相似文献
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The single-longitudinal-mode operation of a ridge waveguide laser based on two-dimensional photonic crystals
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An electrically driven, single-longitudinal-mode GaAs based photonic crystal (PC) ridge waveguide (RWG) laser emitting at around 850 nm is demonstrated. The single-longitudinal-mode lasing characteristic is achieved by introducing the PC to the RWG laser. The triangle PC is etched on both sides of the ridge by photolithography and inductive coupled plasma (ICP) etching. The lasing spectra of the RWG lasers with and without the PC are studied, and the result shows that the PC purifies the longitudinal mode. The power per facet versus current and current-voltage characteristics have also been studied and compared. 相似文献
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研究了LD抽运的单纵模Cr,Tm,Ho∶YAG微片激光器,激光器厚度为1?mm,在用波长785?nm的LD进行端面抽运时,激光器阈值为1060?mW,单纵模激光最大输出功率为31?mW. 对激光器输出功率随温度变化特性进行了研究,验证了CTH∶YAG晶体的温度敏感性. 还研究了激光器的温度调谐特性,实验测得激光器的温度调谐系数为14?GHz/℃.
关键词:
激光光学
CTH∶YAG微片激光器
LD抽运
单纵模运转 相似文献
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We demonstrate the continuous wave p-polarized single longitudinal mode (SLM) operation of an Er:YAG laser at 1617.6nm pumped by a diode-laser with three inserted Fabry-Perot (FP) etalons at room temperature. The Brewster angle inserted FP is applied to obtain the p-polarized laser. For free running, the maximum output power is 570 m W with a pump power of 12.5 W. An incident pump power of 12.5 W is used to generate the maximum p-polarized single longitudinal mode output power of 78.5 m W, corresponding to a slope efficiency of 1.6% and an optical-to-optical efficiency of 0.61%. The beam quality M2 is measured to be 1.15 at the highest SLM output power. This stable polarized SLM oscillation is encouraging due to its application for an injection-locked system used as a master laser. 相似文献
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为了产生频差可调谐1 064nm双频激光输出,设计了一种扭转模结构双腔双频Nd∶YAG激光器,其两个驻波谐振腔共用相同的Nd∶YAG增益介质,以扭转模结构消弱增益空间烧孔效应,使Nd∶YAG激光器的两个驻波腔均以单纵模振荡,从而获得正交线偏振1 064nm双频激光输出.理论分析了扭转模结构激光单纵模选择原理和双频激光同时振荡原理,实验研究了双频激光振荡特性和频差调谐特性.研究结果表明:双频Nd∶YAG激光器的两个谐振腔能够同时以线偏振单纵模稳定振荡输出,其频差大小可随激光腔长的改变而调谐,频差调谐范围可达1个纵模间隔,实验观察到的频差调谐范围为0.3GHz~3GHz. 相似文献
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输出波长在560~590nm的全固态拉曼黄光激光器是近几年兴起的激光器之一。目前,此类激光器内部多模振荡引起的黄光输出谱线单色性较差的问题还没有得到解决。针对这一情况,提出将扭转模腔与拉曼复合腔相结合的新型解决方案,从根本上消除增益介质中空间烧孔效应引起的基频光多模振荡,实现单纵模黄光输出。拉曼复合腔由L型基频光谐振腔与直线型拉曼谐振腔耦合而成,既保证各个非线性变换过程可充分利用腔内的高功率密度,又可相对独立地对不同波长的光路进行优化调节,从而使整个系统实现最佳输出。该设计有助于在全固态拉曼激光器中实现毫瓦量级的单纵模黄光输出,为基于黄激光的生物医疗、钠导星、空间目标识别等系统提供理想的固体黄光光源。 相似文献