OSA: Spatial Light Measurement
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.
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Core diameter dependence (Reference 50 μm)
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How optical input structure affects optical power measurement
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Limitation of minimum wavelength resolution by optical fiber
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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
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
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。
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