TY - JOUR
T1 - Investigation of Self-injection Locked Visible Laser Diodes for High Bit-rate Visible Light Communication
AU - Shamim, Md. Hosne Mobarok
AU - Shemis, Mohamed
AU - Shen, Chao
AU - Oubei, Hassan M.
AU - Ng, Tien Khee
AU - Ooi, Boon S.
AU - Khan, Mohammed Zahed Mustafa
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors thankfully acknowledge the support from Deanship of Research, King Fahd University of Petroleum and Minerals (KFUPM) through the grant KAUST004. The financial support from King Abdulaziz City for Science and Technology (KACST), Grant No. EE2381 and KACST TIC R2-FP-008 are gratefully acknowledged. This work was partially supported by King Abdullah University of Science and Technology (KAUST) baseline funding, BAS/1/1614-01-01, KAUST funding KCR/1/2081-01-01, and GEN/1/6607-01-01, as well as KAUST-KFUPM Special Initiative (KKI) Program, REP/1/2878-01-01.
PY - 2018/6/22
Y1 - 2018/6/22
N2 - We report on self-injection locking in InGaN/GaN (blue/green) and InGaP/AlGaInP (red) visible-light laser diodes. The free-space optical feedback path was accomplished via an external mirror. The effect of injection current, optical power injection ratio, and external cavity length on the spectral linewidth and modulation bandwidth of the lasers are investigated. Our results show that the laser performance was substantially improved. In particular, we achieved a significant increase of ~57% (1.53 GHz - 2.41 GHz) and ~ 31 % (1.72 GHz - 2.26 GHz) in the modulation bandwidth, and ~9 (1.0 nm to 0.11 nm) and ~ 9 (0.63 nm to 0.07nm) times reduction in spectral linewidth of the green and blue lasers, respectively. Consequently, side-mode-suppression-ratio was considerably increased in all the cases, reaching as high as ~20 dB in self-injection locked blue laser diode, thus enabling a close to single mode operation. This work paves the way for attaining high speed optical wireless communications by overcoming the challenges of limited modulation bandwidth and multimode operation of visible laser diodes with this simple scheme.
AB - We report on self-injection locking in InGaN/GaN (blue/green) and InGaP/AlGaInP (red) visible-light laser diodes. The free-space optical feedback path was accomplished via an external mirror. The effect of injection current, optical power injection ratio, and external cavity length on the spectral linewidth and modulation bandwidth of the lasers are investigated. Our results show that the laser performance was substantially improved. In particular, we achieved a significant increase of ~57% (1.53 GHz - 2.41 GHz) and ~ 31 % (1.72 GHz - 2.26 GHz) in the modulation bandwidth, and ~9 (1.0 nm to 0.11 nm) and ~ 9 (0.63 nm to 0.07nm) times reduction in spectral linewidth of the green and blue lasers, respectively. Consequently, side-mode-suppression-ratio was considerably increased in all the cases, reaching as high as ~20 dB in self-injection locked blue laser diode, thus enabling a close to single mode operation. This work paves the way for attaining high speed optical wireless communications by overcoming the challenges of limited modulation bandwidth and multimode operation of visible laser diodes with this simple scheme.
UR - http://hdl.handle.net/10754/628027
UR - https://ieeexplore.ieee.org/document/8392668/
UR - http://www.scopus.com/inward/record.url?scp=85049072952&partnerID=8YFLogxK
U2 - 10.1109/JPHOT.2018.2849884
DO - 10.1109/JPHOT.2018.2849884
M3 - Article
SN - 1943-0655
VL - 10
SP - 1
EP - 11
JO - IEEE Photonics Journal
JF - IEEE Photonics Journal
IS - 4
ER -