Single longitudinal mode frequency converted laser

A frequency-doubled solid-state laser comprising:

• a diode pumping source that produces optical pumping radiation;
• a coupled resonant cavity including a first resonant cavity, a second resonant cavity and a common partially reflecting mirror shared between said first resonant cavity and said second resonant cavity, said first resonant cavity being defined by an input mirror and said common partially reflecting mirror, said second resonant cavity being defined by an output mirror and said common partially reflecting mirror;
• a solid-state laser medium disposed within said first resonant cavity and being optically pumped by said optical pumping radiation, said solid-state laser medium generating a first laser radiation at a first wavelength in a single transverse mode;
• an optical wavelength converting means disposed within said second resonant cavity that converts said first laser radiation at said first wavelength into a second laser radiation at a second wavelength, said common partially reflecting mirror being formed on an intermediate surface of one of said solid-state laser medium and said optical wavelength converting means;
• and
• temperature controlling means for controlling temperatures of said first and second resonant cavities, wherein said first resonant cavity and said second resonant cavity are used for oscillating said first laser radiation at said first wavelength and wherein said common partially reflecting mirror partially reflects laser radiation at said first wavelength and partially transmits said first laser radiation at said first wavelength.

A frequency-converted coupled resonant cavity used in a solid-state laser comprising:

• a first resonant cavity having a first optical path length and including a solid-state laser medium used for generating a first laser radiation at a first wavelength;
• a second resonant cavity having a second optical path length and including an optical wavelength converting means for converting said first laser radiation at said first wavelength into a second laser radiation at a second wavelength, wherein the ratio of said second optical path length to said first optical path length is about a value selected from the group of 0.5, 1.5, 2.5, 3.5, 4.5, 5.5, 6.5, 7.5, and 8.5;
• and
• a common partially reflecting mirror shared between said first resonant cavity and said second resonant cavity, said common partially reflecting mirror partially reflecting said first laser radiation at said first wavelength and partially transmitting said first laser radiation at said first wavelength.

A coupled resonant cavity used in a single longitudinal mode frequency-converted solid-state laser comprising:

• a first resonant cavity having a first optical path length and including a solid-state laser medium used for generating a first laser radiation at a first wavelength;
• a second resonant cavity having a second optical path length and including an optical wavelength converting means for converting said first laser radiation at said first wavelength into a second laser radiation at a second wavelength, wherein the ratio of said second optical path length to said first optical path length is such that said laser operates in a single longitudinal mode;
• and
• a common partially reflecting mirror shared between said first resonant cavity and said second resonant cavity, said common partially reflecting mirror partially reflecting said first laser radiation at said first wavelength and partially transmitting said first laser radiation at said first wavelength.

A coupled resonant cavity used in a single longitudinal mode frequency-converted solid-state laser comprising:

• a first resonant cavity having a first optical path length and including a solid-state laser medium used for generating a first laser radiation at a first wavelength;
• a second resonant cavity having a second optical path length and including an optical wavelength converting means for converting said first laser radiation at said first wavelength into a second laser radiation at a second wavelength, wherein the ratio of said second optical path length to said first optical path length is such that said laser operates in a single longitudinal mode;
• and
• temperature controlling means for controlling the temperature of said first resonant cavity and of said second resonant cavity to adjust said first and second optical path lengths.

A single longitudinal mode, frequency-converted solid-state laser comprising:

• an optical pumping source that produces optical pumping radiation;
• a laser resonant cavity including a first resonant cavity and a second resonant cavity that share a common partially reflecting mirror, said laser resonant cavity receiving said optical pumping radiation;
• a solid-state laser medium disposed within said laser resonant cavity and being optically pumped by said optical pumping radiation, said solid-state laser medium generating a first laser radiation at a first wavelength;
• an optical wavelength converting means disposed within said laser resonant cavity for converting said first laser radiation at said first wavelength into a second laser radiation at a second wavelength;
• and
• a temperature controller for controlling the temperature of said first resonant cavity and said second resonant cavity, wherein said first resonant cavity and said second resonant cavity are used for oscillating said first laser radiation at said first wavelength and wherein optical path lengths of said first resonant cavity and of said second resonant cavity are selected such that only one longitudinal mode of said laser resonant cavity is within the gain bandwidth of said laser medium.