Nonlinear absorption and carrier dynamics in slab-coupled optical waveguide amplifiers
Limitations imposed on the saturation energy of high-power slab-coupled optical waveguide amplifiers were studied for pulsed signal transmission. Loss due to the two-photon absorption and free-carrier absorption processes becomes a dominant factor for ultrashort-pulse amplification, leading to lower...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Institute of Electrical and Electronics Engineers
2010
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| Online Access: | http://hdl.handle.net/1721.1/60057 https://orcid.org/0000-0002-6032-8636 |
| Summary: | Limitations imposed on the saturation energy of high-power slab-coupled optical waveguide amplifiers were studied for pulsed signal transmission. Loss due to the two-photon absorption and free-carrier absorption processes becomes a dominant factor for ultrashort-pulse amplification, leading to lower saturation energy. TPA and FCA coefficients are measured to be 65 cm/GW and 7times10[superscript -17] cm[superscript 2], respectively. Carrier-related gain recovery times vary from 160 ps to 380 ps at bias currents from 4 A to 1 A, respectively. |
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