  Integrated photonic circuits offer the possibility for complex quantum
optical experiments in higher-dimensional photonic systems. However, the
advantages of integration and scalability can only be fully utilized with the
availability of a source for higher-dimensional entangled photons. Here, a
novel fiber integrated source for path-entangled photons in the telecom band at
1.55\mum using only standard fiber technology is presented. Due to the special
design the source shows good scalability towards higher-dimensional entangled
photonic states (quNits), while path entanglement offers direct compatibility
with on-chip path encoding. We present an experimental realization of a
path-entangled two-qubit source. A very high quality of entanglement is
verified by various measurements, i.a. a tomographic state reconstruction is
performed leading to a background corrected fidelity of (99.45+-0.06)%.
Moreover, we describe an easy method for extending our source to arbitrarily
high dimensions.
