We report a tunable self-injection locked violet laser diode external cavity system exhibiting a continuous wavelength tunability of 5.15 nm (400.28 - 405.43 nm) with mean side-mode-suppression-ratio (SMSR) and linewidth of ~23 dB and ~190 pm, respectively. The effects of injection current and temperature indicate a robust system besides being cost-effective and straightforward. Moreover, a successful indoor on-off keying transmission at two different locked modes on a 0.4 m free space channel showed ~10 times improvement in the bit-error-rate (BER) with value ~8×10-4 at 2 Gb/s, and better performance on 0.8 m channel length at 1.75 Gb/s compared to the free-running laser case. Our work is a potential step towards the realization of future high data capacity narrow-wavelength-spaced multiplexed optical wireless communication system wherein continuously tunable laser sources are expected to play a crucial role as transmitters.
|Original language||English (US)|
|Number of pages||1|
|Journal||IEEE Photonics Technology Letters|
|State||Published - Mar 26 2020|
Bibliographical noteKAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): GEN/1/6607-01-01, KCR/1/2081-01-01, REP/1/2878-01-01
Acknowledgements: Authors at King Fahd University of Petroleum and Minerals (KFUPM) acknowledge the support received from King Abdulaziz City for Science and Technology (KACST), Saudi Arabia, through grant no. EE2381 that is sub-awarded from the main grant no. KACST TIC R2-FP-008. Authors from King Abdullah University of Science and Technology (KAUST), acknowledge the funding (grant nos. BAS/1/1614-
01-01, KCR/1/2081-01-01, and GEN/1/6607-01-01); and KAUST-KFUPM Special Initiative (KKI) Program (REP/1/2878-01-01).