Optical parametric oscillator

An optical parametric oscillator (OPO) is a parametric oscillator that oscillates at optical frequencies. It converts an input laser wave (called "pump") with frequency $\omega_p$ into two output waves of lower frequency ( $\omega_s, \omega_i$ ) by means of second-order nonlinear optical interaction. The sum of the output waves' frequencies is equal to the input wave frequency: $\omega_s + \omega_i=\omega_p$ . For historic reasons, the two output waves are called "signal" and "idler", where the output wave with higher frequency is called signal. A special case is the degenerate OPO, when the output frequency is one-half the pump frequency, $\omega_s=\omega_i=\omega_p/2$ .

单词	Optical parametric oscillation
释义	Optical parametric oscillation 英语百科 Optical parametric oscillator An optical parametric oscillator (OPO) is a parametric oscillator that oscillates at optical frequencies. It converts an input laser wave (called "pump") with frequency $\omega_p$ into two output waves of lower frequency ( $\omega_s, \omega_i$ ) by means of second-order nonlinear optical interaction. The sum of the output waves' frequencies is equal to the input wave frequency: $\omega_s + \omega_i=\omega_p$ . For historic reasons, the two output waves are called "signal" and "idler", where the output wave with higher frequency is called signal. A special case is the degenerate OPO, when the output frequency is one-half the pump frequency, $\omega_s=\omega_i=\omega_p/2$ .
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Optical parametric oscillation

Optical parametric oscillator