Using Saganc loop of optical-injected semiconductor laser scheme for stable and continuous CW wavelength-tuning

Abstract

We propose and experimentally investigate a stable and continuous wavelength-tuning laser structure by using self-injected Fabry-Perot laser diode (FP-LD) with Saganc loop scheme. In this proposed laser scheme, the lasing wavelength can be tuned in the range of 1526.20 to 1549.75 nm with tuning-step of 1.30 nm in single-longitudinal-mode (SLM) output. Here, the maximum and minimum output powers are -7.4 and -17.0 dBm, and their corresponding side-mode suppression ratios are 52.0 and 52.8 dB/0.05 nm, respectively. Moreover, to achieve the continuous wavelength tuning, we can also adjust the temperature of FP-LD for wavelength shifting.