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OSA: Spatial Light Measurement

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When measuring light emitted into space, the emitted light needs to be captured into an optical fiber before entered in to an optical spectrum analyzer (OSA). However, there are cases where ordinary optical fibers cannot capture a sufficient amount of light in the OSA, such as the output of a light source that emits light from a surface such as an LED or a fluorescent lamp and pulsed light with a low duty ratio (short emission time and long repetition period).

The applicable models have a free space structure inside the optical input port which allows to use an optical fiber with a core diameter of up to 800 µm, so the use of large core fiber helps the OSA collect more light. Please note that the actual minimum wavelength resolution is limited by the core diameter of the optical fiber used (See lower right table) and for wavelengths over 2000 nm, an optical fiber with low infrared absorption (e.g. fluoride fiber) is required. In OSA that uses an optical fiber in the optical input port, even if the core diameter of the external optical fiber is increased, the amount of light that can be taken in is not increased because it is limited by the core diameter of the internal optical fiber.

 

Core diameter dependence (Reference 50 μm)

Core diameter dependence (Reference 50 μm)

 

How optical input structure affects optical power measurement

How optical input structure affects optical power measurement

 

Limitation of minimum wavelength resolution by optical fiber

Optical fiber

Minimum wavelength resolution (nm)

Type

Core

(μm)

AQ6360

Telecom

AQ6370

Telecom

AQ6373

VIS

AQ6374

VIS- exNIR

AQ6375

exNIR-SWIR

AQ6376

exNIR-MWIR

AQ6377

SWIR-MWIR

SM

5

0.1

0.02

0.02 *1

0.05

0.05

0.1

SM

5

0.2

SM

9.5

0.1 *1

0.02 *1

0.02

0.05* 1

0.05 *1

0.1 *1

SM

9.5

0.2

GI

50

0.1

0.05

0.05

0.2

0.1

0.1

SM

13

0.2 *1

GI

62.5

0.1

0.05

0.05

0.2

0.1

0.1

MM

50

0.5

SI

80

0.2

0.1

0.1

0.2

0.2

0.2

MM

80

1

SI

100

0.5

0.2

0.2

0.5

0.5

0.5

MM

100

1

SI

200

1

0.5

0.5 *2

0.5 *2

1

1

MM

200

2

SI

400

2

1

1 *2

1 *2

2

2

MM

400

5

SI

800

2

2

2 *2

2 *2

2

2

 

 

 

Approximate values at reference wavelengths   *1 Reference optical fiber type *2 Core size setting: Large

相关行业

相关产品和解决方案

AQ6370E Telecom 600 - 1700 nm

  • 0.02 nm resolution
  • ±8 pm accuracy
  • 67 dB dynamic range
  • -90 dBm level sensitivity
  • singlemode and multi-mode

AQ6373E Visible Wavelength 350 - 1200 nm

  • 0.02 nm resolution
  • ±50 pm accuracy
  • 60 dB dynamic range
  • -80 dBm level sensitivity
  • singlemode and multi-mode
  • industrial & biomedical laser testing

AQ6374E Wide Wavelength Range 350 - 1750 nm

  • 0.05 nm resolution
  • ±50 pm accuracy
  • 60 dB dynamic range
  • -80 dBm level sensitivity
  • singlemode and multi-mode
  • visible to communications wavelengths

AQ6375E Long Wavelength 1200 to 2400 nm and 1000 to 2500 nm

  • 0.05 nm resolution
  • ±50 pm accuracy
  • 55 dB dynamic range
  • -70 dBm level sensitivity
  • singlemode and multi-mode
  • NIR and SWIR wavelengths

AQ6376E Three Micron 1500 - 3400 nm

  • 0.1 nm resolution
  • ±0.5 nm accuracy
  • 55 dB dynamic range
  • -65 dBm level sensitivity
  • singlemode and multi-mode
  • SWIR and MWIR wavelengths

AQ6377E Five Micron 1900 - 5500 nm

  • 0.1 nm resolution
  • ±0.5 nm accuracy
  • 50 dB close-in dynamic range
  • 73 dB measurement dynamic range
  • -60 dBm level sensitivity
  • singlemode and multi-mode
  • MWIR wavelengths

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横河(Yokogawa)光谱分析仪AQ6360 电信设备生产专用,性价比高。基于衍射光栅技术,是光学器件制造的理想工具。

光谱分析仪 AQ6370D

AQ6370C支持600nm至1700nm最具代表性的电信波长范围,使其成为适用于单模和多模光纤电信应用的理想机型。

光谱分析仪 AQ6374

AQ6374覆盖了350 ~ 1750nm的宽范围波长,包括可见光(380 ~ 780nm)和通信领域。

光谱分析仪 AQ6377 1900 - 5500 nm

AQ6377 (5μm)覆盖MWIR领域的长波长机型

光通信产业专用高速光谱分析仪 AQ6361 1200-1700 nm

  • 0.03 nm 波长分辨率
  • ±20 pm 波长精度
  • 55 dB 动态范围
  • -80 dBm 功率灵敏度
  • 减少生产测试时间

短波长光谱分析仪 AQ6373B

AQ6373B提供的350nm到1200nm专用短波长量程可以精确测量380nm到780nm的可见光谱,因此适用于生物科学和其它领域。此型号产品还是测量1064nm Nd:YAG, DPSS激光源的常用工具。

长波长光谱分析仪 AQ6375B

AQ6375B是一款波长可覆盖2μm以上范围的长波长台式光谱分析仪。 它专为一直苦于无长波长测量仪器可用的工程师和研究人员而设计, 在实现了高精度、 高分辨率和高灵敏度测量的同时, 可以提供全面的分析功能, 从而可省去校准步骤和开发外部分析软件的麻烦。

长波长光谱分析仪 AQ6376

AQ6376是波长可覆盖2μm以上范围的长波长台式光谱分析仪, 专为一直苦于无长波长测量仪器可用的工程师和研究人员而设计。 AQ6376在实现了高精度、 高分辨率和高灵敏度测量的同时, 还可以提供全面的分析功能, 从而可省去校准步骤和开发外部分析软件的麻烦。

光测量仪器

YOKOGAWA提供的解决方案可测量传统和前沿的光器件和系统,服务于日益增长的大容量光纤线路以及最新元器件技术。

光谱分析仪

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