Ultra-high power, low RIN and narrow linewidth lasers for C-band DWDM +100km fiber optic link

Abstract

We report advancement in C-band DWDM lasers with ultra-high coupled optical power (>100mW) operated at 500mA. The laser also showed excellent RIN (≥-168dB) and narrow linewidth (<25kHz) suitable for +100km transmission. Life test (>3000hr) performance was robust. IntroductionHigh power diode lasers are the building blocks for dense wavelength division multiplexing (DWDM) long-haul optical link. The increased power enables the +100km long-haul transmission and compensates the insertion loss. Using DWDM technology, several wavelengths, typically in 1550nm C-band, can simultaneously multiplex signals to expand bandwidth over a strand of fiber [1].Recently, we have made further technological advancement in high power distributed feedback (DFB) lasers that show excellent power, narrow spectral linewidth and low relative intensity noise (RIN) required for C-band, +100km long-haul transmission. We als demonstrate good manufacturability and excellent reliability performance.