Abstract
We describe narrow linewidth tunable lasers for digital coherent system. To realize high transmission
capacity, and wider deployment to metro and data center network, packaging technology for small
footprint, and μ-Integrable Tunable Laser Assembly (μ-ITLA) characteristics with DFB/DR laser array
based tunable laser were reported. We realized the highly reliable packaging technique by applying an
adhesive bonding technique, high performance fl exible grid μ-ITLA with less than 300kHz linewidth.
