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Asymmetric double QW superluminescent diodes for broadband and high‐power use
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- Authors
- Oh-Kee Kwon, Chul Wook Lee
- Issue Date
- 2018-02
- Citation
- Microwave and Optical Technology Letters, v.60, no.2, pp.494-498
- ISSN
- 0895-2477
- Publisher
- John Wiley & Sons
- Language
- English
- Type
- Journal Article
- Abstract
- We report the use of broadband and high-power InGaAs/GaAs asymmetric double quantum-well (ADQW) superluminescent diodes (SLDs), which consist of a tilted, bent, and straight waveguide. To examine the effects of the arrangement of the ADQW and the gain provided by a straight waveguide on the output performances, we fabricated SLDs with different lengths for two types of ADQW, that is, a wide QW at the p-side for Sample 1, and a narrow QW at the p-side for Sample 2, and tested their spectral width and output power. The fabricated SLDs with a straight length (L3) of 80 μm show ?닋3 dB spectral widths of 122 and 116 nm and output powers of 20 and 16 mW at an injection current of 250 mA for Samples 1 and 2, respectively. For both samples, it appears that, as the L3 increases, the spectral width decreases and the output power increases. From this result, we confirmed that both the spectral width and the output power can be adjusted and optimized at a given structure for various applications.
- KSP Keywords
- 16 nm, High power, Injection current, Output power, Superluminescent diodes(SLDs), output performance, quantum wells, spectral width