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One-dimensional lattices with chiral symmetry are known to possess quantizedZak phase and nontrivial topological phases. Here it is shown that quantizedZak phase and nontrivial edge states, partially protected by inversion symmetryrather than chiral symmetry, can be observed and probed in the bulk exploitingcontinuous-time photonic quantum walk in zig-zag waveguide arrays. Averagedbeam displacement measurements can detect quantized Zak phase and non-trivialtopological phases in the extended Su-Schrieffer-Heeger model with brokenchiral symmetry.

Probing one-dimensional topological phases in waveguide lattices with broken chiral symmetry