• Title/Summary/Keyword: 레이저 복사출력계 교정

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Development of Laser Power Meter Calibration System with 12-diode Laser Sources (12개 다이오드 레이저를 활용하는 레이저 복사출력계 교정시스템 개발)

  • Kanghee Lee;Jae-Keun Yoo;In-Ho Bae;Seongchong Park;Dong-Hoon Lee
    • Korean Journal of Optics and Photonics
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    • v.35 no.2
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    • pp.61-70
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    • 2024
  • We demonstrate a laser power meter calibration system based on 12-diode laser sources coupled to single-mode fibres in a wavelength range from 400 to 1,600 nm. In our system, three laser power controllers ensure that the output power uncertainty of all laser sources is less than 0.1% (k=2). In addition, all laser beams are adjusted to have similar beam sizes of approximately 2 mm (1/e2-width) at the measurement position to minimise unmeasured laser power on a detector. As a reference detector, we use an integrating sphere combined with silicon and indium gallium arsenide photodiodes to minimise the non-uniformity and non-linearity of responsivity. The minimum uncertainty of the calibration system is estimated to be 1.1% (k=2) for most laser wavelengths.

Absolute Measurement of the Quantum Efficiency of Photodetectors Using Correlated Photon Pairs (광자쌍을 이용한 광검출기의 양자효율 절대측정)

  • 안경진
    • Korean Journal of Optics and Photonics
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    • v.4 no.4
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    • pp.452-456
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    • 1993
  • The quantum efficiencies of photomultiplier tubes were measured by counting the coincidence photon pairs generated in the process of spontaneous parametric down-conversion. They were measured within 3% accuracy over the range of wavelength from 560 to 850 nm without any standard light source or detector. The values for 633 nm correspond to those obtained with a calibrated laser power meter within the measurement error.

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