title: Phosphorous Diffuser Diverged Blue Laser Diode for Indoor Lighting and Communication.
abstract: An advanced light-fidelity (Li-Fi) system based on the blue Gallium nitride (GaN) laser diode (LD) with a compact white-light phosphorous diffuser is demonstrated for fusing the indoor white-lighting and visible light communication (VLC). The phosphorous diffuser adhered blue GaN LD broadens luminescent spectrum and diverges beam spot to provide ample functionality including the completeness of Li-Fi feature and the quality of white-lighting. The phosphorous diffuser diverged white-light spot covers a radiant angle up to 120(o) with CIE coordinates of (0.34, 0.37). On the other hand, the degradation on throughput frequency response of the blue LD is mainly attributed to the self-feedback caused by the reflection from the phosphor-air interface. It represents the current state-of-the-art performance on carrying 5.2-Gbit/s orthogonal frequency-division multiplexed 16-quadrature-amplitude modulation (16-QAM OFDM) data with a bit error rate (BER) of 3.1 × 10(-3) over a 60-cm free-space link. This work aims to explore the plausibility of the phosphorous diffuser diverged blue GaN LD for future hybrid white-lighting and VLC systems.
authors.affiliation: Graduate Institute of Photonics and Optoelectronics, National Taiwan University (NTU), No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan, Republic of China.
authors.forename: Yu-Chieh
authors.initials: YC
authors.lastname: Chi
authors.affiliation: Department of Photonics, National Chiao Tung University, No. 1001 Ta Hsueh Rd., Hsinchu 30050, Taiwan, Republic of China.
authors.forename: Dan-Hua
authors.initials: DH
authors.lastname: Hsieh
authors.affiliation: Graduate Institute of Photonics and Optoelectronics, National Taiwan University (NTU), No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan, Republic of China.
authors.forename: Chung-Yu
authors.initials: CY
authors.lastname: Lin
authors.affiliation: Graduate Institute of Photonics and Optoelectronics, National Taiwan University (NTU), No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan, Republic of China.
authors.forename: Hsiang-Yu
authors.initials: HY
authors.lastname: Chen
authors.affiliation: Department of Photonics, National Chiao Tung University, No. 1001 Ta Hsueh Rd., Hsinchu 30050, Taiwan, Republic of China.
authors.forename: Chia-Yen
authors.initials: CY
authors.lastname: Huang
authors.affiliation: Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) division, King Abdullah University of Science &Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
authors.forename: Jr-Hau
authors.initials: JH
authors.lastname: He
authors.affiliation: Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) division, King Abdullah University of Science &Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
authors.forename: Boon
authors.initials: B
authors.lastname: Ooi
authors.affiliation: Materials Department, University of California, Santa Barbara, CA 93106, USA.|Electrical and Computer Engineering Department, University of California, Santa Barbara, CA 93106, USA.
authors.forename: Steven P
authors.initials: SP
authors.lastname: DenBaars
authors.affiliation: Materials Department, University of California, Santa Barbara, CA 93106, USA.|Electrical and Computer Engineering Department, University of California, Santa Barbara, CA 93106, USA.
authors.forename: Shuji
authors.initials: S
authors.lastname: Nakamura
authors.affiliation: Department of Photonics, National Chiao Tung University, No. 1001 Ta Hsueh Rd., Hsinchu 30050, Taiwan, Republic of China.
authors.forename: Hao-Chung
authors.initials: HC
authors.lastname: Kuo
authors.affiliation: Graduate Institute of Photonics and Optoelectronics, National Taiwan University (NTU), No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan, Republic of China.|Department of Electrical Engineering, National Taiwan University (NTU), No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan, Republic of China.
authors.forename: Gong-Ru
authors.initials: GR
authors.lastname: Lin