  We demonstrate the generation, 40 km fiber transmission, and homodyne
detection of single-mode squeezed states of light at 1550 nm using real-time
phase control of a locally generated local oscillator, often called a "real
local oscillator" or "local local oscillator". The system was able to stably
measure up to around 3.7 dB of noise suppression with a phase noise uncertainty
of around 2.5$^\circ$, using only standard telecom-compatible components and a
field-programmable gate array (FPGA). The compactness, low degree of complexity
and efficacy of the implemented scheme makes it a relevant candidate for long
distance quantum communication in future photonic quantum networks.
