Transmission Distance Extension of Directly Modulated Tunable V-cavity Laser Using AWG Wavelength Detuning

Abstract

Directly modulated tunable lasers are highly desirable for constructing densewavelength division multiplexing (DWDM) access networks, owing to their advantages of low cost, compact size and low power consumption. However, the transmission distance for 10 Gbps is usually limited to about 10 km in the telecom C-band in standard single-mode fiber (SMF) due to wavelength chirp. Here we propose and demonstrate a simple technique for extending the transmission distance by detuning the wavelength of a tunable V-cavity laser with respect to DWDM multiplexers. Experiment results show that 10 Gbps signal can be transmitted error-free (BER<10 −12) over 20 km SMF with a wavelength-detuning with respect to a Gaussian-type arrayed waveguide grating (AWG) without dispersion compensation. The power penalty is only 1 dB compared to the back-to-back transmission.

Design and cavity surface optimization of a new electro-absorption modulation laser

“…The explosive growth of the internet and related data-driven applications has dramatically increased the demand for low-cost, high-speed Fiber-optic communication systems, electro-absorption modulated laser (EML) as the preferred light source of optical fiber communication has also become the current research hotspot [1][2][3] . In EML manufacturing technology, the selective-area growth and double-stack Active layer (SAG-DSAL )technology integrates the advantages of butt growing technology, selective area epitaxy technology and dual active area stacking technology, it has a very good prospect of development [4][5] .However, with the use of 100 Gps and 400 Gps optical networks, the response speed of this type of laser still needs to be improved in the high frequency modulation environment, and this type of laser mostly adopts ridge waveguide structure, which is a weak refractive index waveguide, because of the weak limitation of the lateral waveguide, the laser has a large far-field divergence angle and a low light-field coupling efficiency [6] .When the temperature of the cavity surface reaches a critical value of 393.15 K-433.15 K ( 120°C-160°C) at high temperature for a long time, the secondary catastrophic optical damage will occur.…”

Global modes and coupled modes for integrated twin circular-side octagon microlasers

“…Coupled lasers were demonstrated in achieving stable single-mode operation using parity-time symmetry [11,19]. In addition, different types of coupled cavities based on the Vernier effect, such as etched or cleaved coupled-cavity lasers [20][21][22], coupled-ring lasers [23,24], Y-branch lasers [25], as well as V-coupled lasers [26,27], were applied to realize single-mode lasing.…”