Packaged 1.55 µm DFB laser with 25 GHz modulationbandwidth

Abstract
25 GHz modulation bandwidth is achieved from a fully packaged 1.55 µm DFB laser, using devices with p-doped compressively strained MQW active regions and large negative wavelength detuning. Devices on submounts show a record bandwidth of 26 GHz, limited by device and bonding parasitics. Resonance frequencies of over 26 GHz are measured.