可调谐染料激光的窄谱宽输出

前言 可调谐染料激光器已被广泛地应用于激光光谱学、激光化学、同位素分离、医学和生物学等领域。在全息技术、光通讯、军事等方面染料激光器的应用也在不断扩大。在上述的许多应用中都要求有高的分辨率,而分辨率与激光输出的谱线宽度成反比。因而,如何压窄激光谱线宽度以达到提高分辨率是个很重要的课题。 使用棱镜扩束器的脉冲染料激光器,其优点是光学元件比较经济,准直容易,系统紧凑。适当地选择不同折射率的棱镜及其角度,可使染料激光输     

用于光WDM网中的高反射损耗可调F-P腔的设计

设计了具有高反射损耗特性的光解复用器，它具有插入损耗小，反射损耗大，并且可以进行电压调谐的特点。     

使用色散型布儒斯特棱镜扩束的宽调谐染料激光器

本文报道一台光谱实验用闪光灯泵浦的染料激光器,它使用色散型布儒斯特棱镜扩束器,具有宽阔的连续调谐范围和较窄的线宽,采用复合腔调频可获得高的激光效率。     

无源谐振腔激光陀螺实验系统的研制

报道了采用反射型谐振腔结构的无源谐振腔激光陀螺系统。在实验室环境下,取得了漂移稳定性1.7deg/h的性能。指出了引起陀螺漂移的误差因素,并提出进一步改善陀螺测量精度的措施。     

LD泵浦不同腔结构高效运转掺铥光纤激光器

研究了掺铥光纤激光器的不同谐振腔结构方式。使用LD泵浦,分别采用双色镜和端面反射、高反光纤光栅和端面反射以及双色镜和低反光纤光栅构成激光器谐振腔,均获得了超过Stokes极限的斜效率。其中双色镜和端面反射腔结构下获得了最高斜效率56.9%,对应的量子效率为142%。三种腔结构下,激光光谱线宽由激光器系统所采用的反射腔的光谱特性所决定。在双色镜和端面反射腔结构下,激光器在双色镜的高反带宽内随机起振,光谱较宽;在使用光纤布拉格光栅作为激光器谐振腔的高反射腔镜和低反射腔镜的情况下,激光器都获得了2 m处的窄线宽输出,线宽受限于所使用的光纤光栅的反射带宽。     

Unstable ring resonator with an intracavity prism beam expander

A type of unstable ring resonator that includes a prism beam expander is proposed. Neither lenses nor curved mirrors are used, and transverse mode discrimination is achieved, despite the one-dimensional beam expansion, by configuring the cavity mirrors to cause 90° image rotation during a round-trip pass. The output beam has a filled-in rectangular cross section, and the cross section of the resonator mode is also rectangular.     

用可调谐法布里-珀罗腔测量光纤光栅波长

提出了一种利用压电陶瓷构成的可调谐法布里 -珀罗腔测量光纤光栅反射波长的方案 ,该方案可以直接将波长转换为电信号。阐述了该方案的基本原理 ,并讨论了在设计法布里 -珀罗腔时应考虑的几个问题。     

Use of a beam expanding telescope in a grating-tuned waveguide CO2 laser

A Galilean telescope is used as a beam expander in a grating tuned CO₂ waveguide laser to improve line selection while minimizing cavity length to maximise the frequency tuning range. The laser has been used in optoacoustic measurements of saturation of absorption on the transition pumping the 891 μm CH₂CF₂ laser.     

增强腔外倍频效率的研究

本文介绍在腔外倍频中,加反射腔,使经过倍频后剩余的基频光,被反射腔多次反射叠加在原基频光上,增加了基频光功率,从而提高了倍频效率。介绍了两种光路,在我们现有条件下,效率各提高了２．２６和２．９倍。     

GaAlAs/ GaAs 半导体功率放大激光器的研究

研究一种GaAlAs/ GaAs 材料的高功率半导体功率放大激光器(LD - SLA) 。器件为双 异质结增异导引氧化物条形结构。采用直接耦合方式将半导体激光器(LD) 与半导体功率放大器(SLA) 集成一体,使单管芯输出光功率提高一个数量级。并在器件端面镀高反射膜和增透膜,使器件端面的反射率和透射率由不镀膜时的29 %、71 %提高到90 %以上,进一步提高激光输出。保护器件端面、提高器件使用寿命     

A bi-directional transceiver PIC for ping-pong local loop configurations operating at 1.3-/spl mu/m wavelength

We propose and demonstrate a simple, potentially low-cost, photonic integrated circuit that can operate as a transceiver in a ping-pong optical data-link configuration. The device is designed for uncooled operation, with a gain section, a detector, and a beam expander inside a Fabry-Perot cavity. The detector has a 1.4 /spl mu/m quaternary layer with a broad spectral responsivity range extending to 33 nm higher than the lasing wavelength of the device. The transmitter can provide 8 dBm inside a single-mode fiber, and the beam expander relaxes the alignment tolerance to a single-mode fiber.     

Strain Sensor Using Optical Fiber Unsymmetrical F-P Cavity and the Characteristic Analysis

An intrinsic Fabry-Perot cavity consisted of different reflective mirrors is used in fiber-optical sensors for measuring the strain. The character of the unsymmetrical fiber-optical Fabry-Perot cavity and fiber-optic longitudinal stress-strain effect is analysed. The general theory and measurement method of strain are presented. A low fineness Fabry-Perot cavity is used to improve the linearity of optical fiber strain sensors. The result of experiment agrees well with the theory.     

第二类新光束激光

将突变反射率光腔用于高功率CO2激光器上，产生耦合模，具有多功能的特点。     

基于啁啾光纤光栅的五波长掺铒光纤激光器

提出并实验验证了一种新型的基于啁啾光纤光栅的全光纤的可切换的五波长掺铒光纤激光器,该激光器采用简洁的线性腔结构,使用一段高掺铒的光纤作为增益介质,利用一个内含宽带啁啾光纤光栅的萨格纳克环作为激光器的谐振腔腔镜,担当了一个梳状滤波器的作用,另一个腔镜由一个宽带光纤反射镜担当,适当调整环中的偏振控制器,可以获得最多五波长的激光输出,并具有4种不同的激光输出模式,所有激发线均具有大于32 dB的光学信噪比,小于0.6 nm的线宽以及小于8 dB的峰值功率差异。     

铜激光泵浦染料激光器腔结构的实验研究

对高重复率铜激光横向泵浦染料激光器的四种腔结构进行了实验研究,比较了它们的工作特性.实验发现双棱镜扩束系统加自准直光栅的腔结构最为理想.获得了线宽为0.0012nm、转换效率为7.5%,放大荧光(ASE)背景为1.5%的单纵模激光输出.     

双棱镜扩束、光栅调谐的ps染料激光器

用重复率脉冲锁模YAG激光同步泵浦双棱镜扩束的光栅染料激光腔,对于R-6G激光染料,获得脉冲列重复率为20Hz、脉冲峰值功率为7.6MW、平均功率为9.5mW的30ps可调谐激光,其谱线宽度为0.04nm,接近变换极限宽度。激光输出稳定,调谐方便。     

Cavity coupling structure for planar oscillators showing DR-likereflective characteristics

A new cavity coupling structure has been developed for low-phase noise oscillator applications. Unlike the conventional cavity coupling structures that show absorption at the resonant frequency, the new structure shows high reflection at resonance similar to dielectric resonators, making it suitable for the reflective oscillators. The fabricated cavity resonator showed a loaded Q-factor of 1200 and the X-band oscillator using the new resonator showed phase noise proper-ties of -57 and -83 dBc/Hz at 1 and 10 kHz offset, respectively. This is comparable to the best results of dielectric resonator oscillators using HEMTs at this frequency range     

Study on Refraction Index Sensors Using Fiber Grating F-P Cavity

In this paper, the reflective spectra of a refraction index sensor were analyzed based on fiber grating F-P cavity. The sensor was constituted by two identical fiber gratings. Compared with the refraction index sensor using one fiber grating, the fiber grating F-P cavity sensor has narrower resonant peak and it can be used for more accurate measurement. The resonant peaks in the reflective spectra of the sensor are changed with small changes of the refraction index of the measured chemical liquids or cell samples. So it has potential applications in biology and chemistry.     

An Optically Pumped Far-Infrared Folded Mirror-Less Cavity

A compact and efficient mirror-less cavity is presented for an optically pumped 192-μm far-infrared laser. With a gold-coated mirror and 30°-inclined anti-reflection coated Ge plate serving as highly reflective mirrors, a folded mirror-less CH₃F cavity is achieved. Maximum energy of 0.72 mJ is obtained with the pump energy of 600 mJ, which gives an energy increment of 75% in comparison with the previous 1.85-m mirror-less system. The beam divergence angle of the FIR radiation from this folded mirror-less cavity is measured to be 14.2 mrad.     

漫反射聚光腔灯泵Nd:YAG激光器

分析了漫反射聚光腔的特点,从实验上证实采用漫反射聚光腔可实现灯泵Nd:YAG调Q激光器高能量、高效率输出.