纤维技术信息

To achieve the best system performance, it is important to choose optical fibers that transmit well over your full wavelength range of interest. This will minimize the amount of light lost through fiber coupling, and reduce attenuation of some wavelengths over others. When working in the ultraviolet portion of the spectrum, particularly below 300 nm, it is important to use solarization-resistant fibers, as other fibers will become less transmissive over time at those wavelengths (an effect known as solarization).

在下面查看以找到最适合您应用程序的衰减频谱，或与我们的一名应用工程师联系以获取指导。请记住，1 dB相当于传输中损失的〜21％的光。

我们的光纤和探针组件以三种方式清晰清晰地标记，以便您始终确定零件数，纤维核直径及其最佳效率波长范围。

Boot Colors

The assembly’s boot color lets you know the fiber type and the most efficient wavelength range for using your fiber.

Boot	颜色	产品代码	Fiber Type	Best Efficiency
	灰色的	-XSR	UV-VIS XSR Solarization Resistant	180 – 800 nm
	灰色的	-SR	UV/SR-VIS High OH content	200– 1100 nm
	蓝色的	-UV-VIS	UV-VIS高哦内容	300 - 1100 nm
	红色的	-vis-nir	Vis-nir低OH内容	400 - 2100 nm

乐队颜色

The assembly’s color band tells you the the fiber core diameter.

乐队	颜色	纤维核心大小
	紫色的	8 μm
	蓝色的	50μm
	Green	100μm
	Yellow	200μm
	灰色的	300μm
	红色的	400 μm
	Orange	500μm
	棕色的	600 μm
	Clear	1000μm

纤维组件外套旨在保护纤维并提供应变缓解，但我们有可以做更多的选择。告诉我们有关将使用光纤组件的环境和应用，我们将帮助您选择用于组件的最佳夹克材料。

Jacket	Description	Outer Diameter	耐化学性	蒸汽无菌	温度限制	机械耐受性	Maximum Length
PVC monocoil	PVC覆盖不锈钢单镜；仅OEM申请	3.4毫米	较差的	No	70°C	Good	6 m
PVDF拉链管	Best for budget-conscious applications; standard in lab-grade assemblies	3.8毫米	较差的	No	100°C	Good	50公尺
PVDF拉链管（大OD）	Best for budget-conscious applications; larger in diameter than jacket #2	5.0毫米	较差的	No	100°C	Good	50公尺
Silicone Monocoil	高端外套；高级组件的标准（覆盖不锈钢单镜的硅树脂）	5.6毫米	Good	是的	250°C	Good	20m
不锈钢BX	仅OEM申请；可选的聚烯烃热丝网大衣	5.0毫米	Good	是的	250°C	较差的	4 m
不锈钢完全互锁的BX	Excellent stainless steel jacketing; supports longer lengths of fiber; optional polyolefin heatshrink overcoat	7.0毫米	Good	是的	250°C	Excellent	40 m

Optical fiber works by guiding light down the fiber core due to variations in index of refraction between the core and cladding. A flexible buffer material in one or more layers is then applied to improve flexibility and protect the glass core/cladding. Even with this additional coating, there are still limits on how tightly the fiber can be bent without being prone to microscopic fractures that can lead to breaks.

LTBR（长期弯曲半径）：观察为存储条件的最小半径。
STBR（短期弯曲半径）：使用和处理过程中允许的最小半径。

机械规格：VIS/NIR，UV/VIS，SR纤维

乐队	纤维核心大小	纤维类型	Cladding Thickness	缓冲材料	Buffer Thickness	Maximum OD	Operating Temperature (fiber core)	LTBR	stbr
	50±5μm	VIS/NIR，UV/VIS	35±0.5 µm	聚酰亚胺	17±5 µm	155 µm	-65至300°C	4 cm	2cm
	100± 3 μm	VIS/NIR，UV/VIS	12±5 µm	聚酰亚胺	17 ± 3 µm	155 µm	-65至300°C	4 cm	2cm
	200± 4 μm	VIS/NIR，UV/VIS, SR	10± 4 µm	聚酰亚胺	10±5 µm	243 µm	-65至300°C	8 cm	4 cm
	300 ± 6 μm	Sr	15 ± 7 µm	聚酰亚胺	20±10 µm	380 µm	-65至300°C	12厘米	6厘米
	400 ± 8 μm	VIS/NIR，UV/VIS, SR	20± 3 µm	聚酰亚胺	20± 7 µm	487 µm	-65至300°C	16厘米	8 cm
	500 ± 10 µm	VIS/NIR，UV/VIS	25±3 µm	聚酰亚胺	20±10 µm	600 µm	-65至300°C	20cm	10厘米
	600 ± 10 μm	VIS/NIR，UV/VIS, SR	30±3 µm	聚酰亚胺	25 ± 10 µm	720 µm	-65至300°C	24 cm	12厘米
	1000± 3 µm	VIS/NIR	50 ± 3 µm	丙烯酸酯	50 ± 40 µm	1120µm	-50至85°C	30 cm	15 cm
	1000± 20 µm	紫外线/vis	25±3 µm	丙烯酸酯	50 ± 40 µm	1065 µm	-50至85°C	30 cm	15 cm
VIS/NIR is multimode step index fiber with a low OH fused silica core and glass cladding (400 – 2100 nm) UV/VIS是多模阶段索引纤维，具有高OH熔融二氧化硅芯和玻璃覆层（300 - 1100 nm） Sris multimode step index fiber with a high OH fused silica core and glass cladding (200 – 1100 nm)

Mechanical Specfications: XSR Fibers

乐队	纤维核心大小	纤维类型	覆层OD	缓冲材料s	Primary Buffer OD	Maximum OD	Operating Temperature (fiber core)	LTBR	stbr
	113±6μm（名义115μm）	XSR	125±6 µm	aluminum, polymer	150 µm	230 µm	-50至80°C	4 cm	2cm
	230 ± 12 μm	XSR	250 ± 13 µm	aluminum, polymer	300 µm	380 ± 20 µm	-50至80°C	4 cm	2cm
	455 ± 22 μm	XSR	500±25 µm	铝，硅胶，尼龙	580 µm	1300 ± 100 µm	-50至80°C	8 cm	4 cm
	600±30μm	XSR	660±33 µm	铝，硅胶，尼龙	800 µm	1700±200 µm	-50至80°C	24 cm	12厘米
XSRis multimode step index fiber with a high OH fused silica core and fluorine-doped silica cladding (180 – 900 nm)

Mechanical Specifications: Single mode fibers

乐队	纤维核心大小	纤维类型	覆层OD	缓冲材料	缓冲区OD	Operating Temperature (fiber core)	LTBR	stbr
	8.2 ± 0.2 μm	单模式	125 ± 7 µm	dual acrylate	245±5 µm	-60至85°C	4 cm	2cm
单模式fiber is Corning SMF-28e+ fiber optimized for telecom use (1260 – 1700 nm) Single-mode performance ceases below the cutoff wavelength of λc = 1260 nm

光纤旨在将光从纤维的一端传输到另一端，而能量损失最小。光纤中的操作原理是总内部反射。当光从一种材料传递到另一种材料时，其方向就会改变。根据Snell的定律，可以从两种材料的折射率中预测光射线的新角度。当角度垂直于界面（90º）时，向第二材料的传输是最大的，并且反射为最小。随着角度接近界面的平行，反射会增加。在临界角度和临界角度以下，传输为0％，反射为100％（请参见下图）。

Snell’s Law can be formulated to predict critical angle and also the launch or exit angle θ_max从核心折射索引（n₁）和覆层（n₂）materials. The angle also depends on the refractive index of the media (n）。

The left side of equation is called the numerical aperture (NA），并确定纤维可以接受或发出光的角度范围。

大多数海洋亚博最新网站多少洞察纤维的数值光圈为0.22（请参见下表）。如果纤维在真空或空气中，则转化为接受角度θ_max12.7°（全角度〜25^o）。当光在光纤的末端定向时，所有的光线或轨迹都在±12.7°圆锥内部以内的光线或轨迹通过总内部反射传播纤维的长度。超过该角度的所有光线都穿过覆层并丢失。在纤维的另一端，光在±12.7°的锥体中退出。

There are many types of fibers available, with a variety of numerical apertures. While a fiber with a larger numerical aperture will collect more light than a fiber with a smaller numerical aperture, it is important to look at both ends of the system to ensure that light exiting at a higher angle can be used. In optical sensing, one end is gathering light from an experiment and the other is directing light to a detector. Any light that does not reach the detector will be wasted.

Fiber Type	数值光圈	Full Angle
单模式	0.14	16.1°
VIS/NIR	0.22	25.4°
紫外线/vis	0.22	25.4°
Sr	0.22	25.4°
XSR	0.22	25.4°

Ultraviolet radiation below 300 nm degrades transmission in silica fibers, resulting in solarization (increased light absorption in the fiber that occurs over time and impacts data). For applications below 300 nm, we recommend solarization-resistant assemblies.

XSR纤维具有高透明度和耐用性

极限抗感光(XSR)光纤and probe assemblies for spectroscopy are manufactured using a proprietary process for enhanced UV transmission (signal will transmit to 180 nm) and remarkable resistance to UV degradation, making it ideal for deep-UV applications (<300 nm). Ocean Insight is the only spectroscopy manufacturer to offer XSR Fiber.