Mitsubishi Electric, in October 2022, began shipping samples of its new tunable laser-diode chip for use in optical transceivers of optical-fiber communication systems. The new chip is expected to help increase the capacity of digital coherent communication as well as reduce the size of optical transceivers. The new chip outputs the 1.55μm light wavelength that is used for digital coherent communication. It supports a wide range of wavelengths in compliance with the OIF-400ZR-01.0, 400Gbps optical-transceiver standard. Offering the product in the form of a chip will allow manufacturers the flexibility to optimize package designs for specific optical transceivers.