Abstract

Recently, an alternative method for the generation of phase-locked optical frequency combs (OFCs) with tunable repetition rate that maintain the high optical power levels characteristic of VECSELs was proposed using a first principle model relying on delay algebraic equations (DAEs) [1,2]. A schematic setup of the system is presented in Fig. 1 (a). It is composed of a disk-shaped monomode micro-cavity similar to a VCSEL structure but that contains a nonlinear Kerr medium. The micro-cavity is closed by two distributed Bragg mirrors with reflectivities r_1,2, whereas the long external cavity with round-trip time τ >> τ_c is closed by a feedback mirror with reflectivity η and the feedback phase ϕ.

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