Normally, a single laser beam is used in interferometry, though interference has been observed using two independent lasers whose frequencies were sufficiently matched to satisfy the phase requirements. This has also been observed for widefield interference between two incoherent laser sources.
Normally, a single laser beam is used in interferometry, though interference has been observed? using two independent l!asers whose freque?ncies were sufficiently matched to satisfy the .phase requirements. This has also been observed fo.r widefield interference between two incoherent laser sources.