We demonstrate the possibility of post-fabrication trimming of the response of nitrogen-rich silicon nitride racetrack resonators by using an ultraviolet laser. The results revealed the possibility to efficiently tune the operating wavelength of fabricated racetrack resonators to any point within the full free spectral range. This process is much faster than similar, previously presented methods (in the order of seconds, compared to hours). This technique can also be applied to accurately trim t
2025-09-16 22:12:09 1.39MB
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飞秒激光表面微结构化镍钛合金,杨阳,杨建军,我们在空气的环境中通过飞秒激光划刻镍钛合金表面的实验来研究一种自组织亚波长结构形成的特点。实验发现一种方向与激光偏振垂直
2024-02-27 16:00:40 507KB 首发论文
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% 使用 Steffensen 方法的程序% 用于计算海洋的波长% 波,当我们知道周期和深度时% 的海洋。
2023-12-29 20:30:56 4KB matlab
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将可见光波长转换为(r,g,b) 日期: 2017-09-17 标签: python,波长,RGB 作者: 罗兰·史密斯 rgb模块包含一个函数,可将以nm为单位的波长转换为(R,G,B)值的三元组,每个值在0--255范围内。 执照 gentable.py脚本是根据MIT许可获得许可的。 它的输出rgb.py是自动生成的,因此不具有版权。 笔记 该算法基于。 我第一次遇到它是原始Fortran代码的Pascal翻译。 由于该转换在相对较小的值范围内使用固定函数,因此我针对380至780 nm之间波长的每个整数值预先计算了结果,并将其记录在bytes对象中。 对于单个波长,三个字节用于红色,绿色,蓝色的顺序。 使用zlib压缩此bytes对象,然后使用base64对其进行编码。 代码生成如下。 python3 gentable.py > rgb.py 压缩将数据量减少了
2022-03-26 10:08:59 5KB python3 Python
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L = 波长(T,d) 描述L = 波长(T,d) 根据色散关系返回在(d) 水深中周期(T) 的波的波长。 其中 T 以秒为单位,d 以米为单位,使用正向下约定。
2021-09-13 22:50:37 1KB matlab
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通过使用SU-8负型负极芯(其类型为紫外线(UV)光敏型)和有机-无机杂化材料包层,制造出具有双有源层的紧凑型41×41阵列波导光栅(AWG)器件。 在AWG的计算中选择矩形波导结构,并且可以以5 m的包层厚度和4 mm的芯截面积实现单模。 对于AWG器件,通道空间设置为0.8 nm,中心波长为1550 nm。 经过测试,传输损耗为1.2 dB / cm,中心通道的衍射损耗为6.2 dB,测试通道空间为0.793 nm,中心波长偏移为-0.08 nm /°C。
2021-03-17 11:10:17 387KB Central wavelength; Cladding thickness;
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Natural logarithm wavelength modulation spectroscopy (ln-WMS) is demonstrated in this Letter. Unlike the conventional wavelength modulation spectroscopy (WMS)-2
2021-03-01 17:05:48 1009KB 论文
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A periodically poled lithium niobate (PPLN) optical parametric generator (OPG) pumped by a laser diode (LD)-pumped Q-switched Tm,Ho:GdVO4 laser operated at 2.048 \mum with pump pulse of 25 ns and repetition rate of 10 kHz is reported. A continuous tunable middle-infrared (mid-IR) spectrum of 3.88~4.34 \mum is obtained by changing the crystal temperature from 50 to 124 oC. When the incident pump power is 3 W, the total OPG output power is 95 mW, corresponding to optical conversion efficiency of 3
2021-02-26 14:07:31 192KB 光参量产 Tm Ho:GdVO4 中红外激
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It is well known that a light spot of sub-wavelength will diverge in all directions. In this letter, A method is presented for generating sub-wavelength (0.44\lambda) longitudinally polarized beam, which propagates without divergence over lengths of about 2\lambda in free space. This is achieved by a high numerical aperture (NA) lens axicon that utilizes spherical aberration to duplicate the performance of an axicon and to create an extended focal line.
2021-02-10 16:05:22 474KB 超快现象 双折射 320.7120 260.1440
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Wavelength reuse for short-reach optical access network utilizing MDM
2021-02-07 16:03:23 787KB 研究论文
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