[레이저및광통신실험A+]광섬유 레이저 시스템 제작 및 빔질 측정

문서 내 토픽

1. LD power test

LD power test는 pump의 전류에 따른 최고 출력을 확인하여 이후 실험에서 손실이 얼마나 났는 지 계산하기 위해 진행한다. LD는 pumping 광원으로 사용되며 실험 결과 10A에서 7.71V의 결과를 얻을 수 있었다.
2. Combiner

Combiner는 광신호를 결합하는 역할을 한다. combiner에서의 결합 손실을 확인하기 위해 combiner test를 진행하였고 결합 손실은 15% 전후로 나타났다.
3. HR-4% power

HR-4% power에는 unabsorbed pump power와 signal이 함께 있다. HR-4% power는 pump power에 비례하는 경향을 보이고 손실은 반비례하는 경향을 보인다.
4. Absorbed pump power

광섬유에서 absorbed pump power는 레이저를 증폭하는 데 사용된 power를 의미한다. 따라서 기울기 효율은 레이저를 증폭하는 데 사용한 power 대비 나온 laser power를 의미한다.

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1. LD power test

LD power test is an important process in the development and manufacturing of laser diodes. It involves measuring the optical output power of a laser diode as a function of the input current. This test is crucial for ensuring the laser diode meets the required performance specifications, such as output power, efficiency, and reliability. The test data can also be used to characterize the laser diode's behavior and identify any potential issues or defects. Proper LD power testing is essential for producing high-quality laser diodes that can be reliably used in various applications, such as telecommunications, data storage, and industrial processing.
2. Combiner

A combiner is a device used in optical communication systems to combine multiple optical signals into a single output. This is an important component in wavelength-division multiplexed (WDM) systems, where multiple wavelengths are transmitted over a single optical fiber. Combiners can be passive, such as wavelength-selective couplers, or active, such as semiconductor optical amplifiers (SOAs). The choice of combiner depends on factors like the number of channels, channel spacing, and power requirements. Proper design and implementation of combiners are crucial for ensuring efficient and reliable optical communication systems. Combiners play a key role in increasing the capacity and flexibility of fiber-optic networks.
3. HR-4% power

HR-4% power refers to the output power of a laser diode when the rear facet reflectivity (HR) is 4%. This is an important parameter in the design and characterization of laser diodes, as it provides information about the laser's efficiency and power-handling capabilities. The HR-4% power is typically measured during the laser diode testing and qualification process, and it is used to assess the laser's performance and suitability for various applications. A high HR-4% power indicates that the laser diode can efficiently convert electrical input power into optical output power, which is desirable for applications such as telecommunications, materials processing, and medical diagnostics. Careful control and optimization of the HR-4% power is crucial for ensuring the reliability and performance of laser diode-based systems.
4. Absorbed pump power

Absorbed pump power is a critical parameter in the design and operation of solid-state lasers, such as Nd:YAG or Yb:YAG lasers. It refers to the amount of optical power from the pump source that is actually absorbed by the laser gain medium, which is then used to generate the laser output. Maximizing the absorbed pump power is essential for achieving high laser efficiency and output power. The absorbed pump power depends on factors like the pump source characteristics, the laser gain medium properties, and the optical coupling between the pump and the gain medium. Careful optimization of the absorbed pump power, through techniques like pump beam shaping, wavelength matching, and cavity design, is crucial for developing high-performance solid-state laser systems for applications in areas like materials processing, medical treatment, and scientific research.