Lee Changmin, Shen Chao, Oubei Hassan M, Cantore Michael, Janjua Bilal, Ng Tien Khee, Farrell Robert M, El-Desouki Munir M, Speck James S, Nakamura Shuji, Ooi Boon S, DenBaars Steven P
Opt Express. 2015 Nov 16;23(23):29779-87. doi: 10.1364/OE.23.029779.
We demonstrate data transmission of unfiltered white light generated by direct modulation of a blue gallium nitride (GaN) laser diode (LD) exciting YAG:Ce phosphors. 1.1 GHz of modulation bandwidth was measured without a limitation from the slow 3.8 MHz phosphor response. A high data transmission rate of 2 Gbit/s was achieved without an optical blue-filter using a non-return-to-zero on-off keying (NRZ-OOK) modulation scheme. The measured bit error rate (BER) of 3.50 × 10(-3) was less than the forward error correction (FEC) limit of 3.8 × 10(-3). The generated white light exhibits CIE 1931 chromaticity coordinates of (0.3628, 0.4310) with a color rendering index (CRI) of 58 and a correlated color temperature (CCT) of 4740 K when the LD was operated at 300 mA. The demonstrated laser-based lighting system can be used simultaneously for indoor broadband access and illumination applications with good color stability.
我们展示了通过直接调制激发YAG:Ce荧光粉的蓝色氮化镓（GaN）激光二极管（LD）产生的未滤波白光的数据传输。在没有受到荧光粉3.8MHz缓慢响应限制的情况下，测得调制带宽为1.1GHz。使用非归零开关键控（NRZ-OOK）调制方案，在不使用光学蓝色滤光片的情况下实现了2Gbit/s的高数据传输速率。测得的误码率（BER）为3.50×10⁻³，低于前向纠错（FEC）极限3.8×10⁻³。当LD在300mA下工作时，产生的白光呈现CIE 1931色度坐标为(0.3628, 0.4310)，显色指数（CRI）为58，相关色温（CCT）为4740K。所展示的基于激光的照明系统可同时用于室内宽带接入和照明应用，且具有良好的颜色稳定性。
