Squeezed states of the electromagnetic field are generated through degenerate parametric down conversion in an optical cavity. The experiment demonstrates a noise reduction of more than 50% relative to the vacuum noise level using a balanced homodyne detector. Theoretical analysis suggests that the observed squeezing results from a field that would be squeezed by more than tenfold in the absence of losses. The study shows that the field state is both a squeezed state and a minimal-uncertainty state. The process involves converting photons of frequency ω₂ into correlated pairs of photons near ω₁ = ω₂/2. The experiment uses an optical parametric oscillator (OPO) with a nonlinear optical crystal and a balanced homodyne detector. The results indicate that the signal field is squeezed, with noise levels reduced by more than a factor of 2 compared to the vacuum noise level. Theoretical predictions are compared with experimental data, showing good agreement. The study confirms that the field state is a minimal-uncertainty state, and the results have implications for precision measurement and quantum optics. The research was supported by various institutions, and the technical contributions of several individuals are acknowledged. The findings demonstrate the feasibility of achieving large degrees of squeezing and have potential applications in optical physics involving nonclassical radiation.Squeezed states of the electromagnetic field are generated through degenerate parametric down conversion in an optical cavity. The experiment demonstrates a noise reduction of more than 50% relative to the vacuum noise level using a balanced homodyne detector. Theoretical analysis suggests that the observed squeezing results from a field that would be squeezed by more than tenfold in the absence of losses. The study shows that the field state is both a squeezed state and a minimal-uncertainty state. The process involves converting photons of frequency ω₂ into correlated pairs of photons near ω₁ = ω₂/2. The experiment uses an optical parametric oscillator (OPO) with a nonlinear optical crystal and a balanced homodyne detector. The results indicate that the signal field is squeezed, with noise levels reduced by more than a factor of 2 compared to the vacuum noise level. Theoretical predictions are compared with experimental data, showing good agreement. The study confirms that the field state is a minimal-uncertainty state, and the results have implications for precision measurement and quantum optics. The research was supported by various institutions, and the technical contributions of several individuals are acknowledged. The findings demonstrate the feasibility of achieving large degrees of squeezing and have potential applications in optical physics involving nonclassical radiation.