  The increasing demand for wireless networks of higher capacity requires
key-enabling technologies. Optical wireless communication (OWC) arises as a
complementary technology to radio frequency (RF) systems that can support high
aggregate data rates. However, OWC systems face some challenges including
beam-blockage. Intelligent reflecting surfaces (IRSs) can offer alternative
pathways for the optical signal, ensuring continuous connectivity. In this
work, we investigate the potential of using IRS in an indoor OWC network. In
particular, we define a system model of indoor OWC that employs IRS in
conjunction with angle diversity transmitters (ADT) using vertical-cavity
surface-emitting laser (VCSEL) arrays. The VCSEL beam is narrow, directed, and
easy to block, however, it can deliver high data rates under eye safety
regulations. Simulation results show that the deployment of IRS can
significantly improve the achievable data rates of Laser-based OWC systems.
