Devices and methods for dual excitation Raman spectroscopy

A spectroscopic analysis system comprising:

• an electromagnetic radiation source to provide a first electromagnetic radiation having a first frequency;
• a spectroscopic analysis chamber comprising:
• a resonant cavity to contain a sample for analysis,
• a first window to the cavity to transmit the first electromagnetic radiation into the cavity and to transmit a second electromagnetic radiation out of the cavity,
• a second window to the cavity to transmit a transverse electromagnetic radiation having a second frequency into the cavity, and
• a plurality of reflectors affixed to a housing of the cavity to reflect radiation of a predetermined frequency, the plurality of reflectors separated by a distance that is sufficient to resonate the radiation of the predetermined frequency;
• and
• an electromagnetic radiation detector to detect the second electromagnetic radiation.

A spectroscopic analysis chamber comprising:

• a resonant cavity to contain a sample for analysis, the resonant cavity being configured to receive input excitation radiation in the form of aligned seed radiation and transverse radiation having a first frequency;
• a first window to the cavity to transmit the seed radiation into the cavity and to transmit an output scattered radiation out of the cavity,
• a second window to the cavity to transmit a transverse electromagnetic radiation having a second frequency into the cavity, and
• a plurality of reflectors affixed to a housing of the cavity to reflect radiation of a predetermined frequency, the plurality of reflectors separated by a distance that is sufficient to resonate the radiation of the predetermined frequency.

A spectroscopic analysis system comprising:

• a first electromagnetic radiation source to provide a seed radiation in a first direction;
• a second electromagnetic radiation source to provide a transverse radiation in a second direction;
• a spectroscopic analysis chamber comprising:
• a resonant cavity to contain a sample for analysis, the resonant cavity being configured to receive the seed radiation and transverse radiation,
• a first window to the cavity to transmit the seed radiation into the cavity and to transmit an output scattered radiation out of the cavity, and
• a plurality of reflectors affixed to a housing of the cavity to reflect radiation of a predetermined frequency, the plurality of reflectors separated by a distance that is sufficient to resonate the radiation of the predetermined frequency;
• and
• an electromagnetic radiation detector to detect the output scattered radiation in the second direction.