Collimator block, collimation assembly, and laser

A collimation assembly, comprising a collimator block, a beam expander lens assembly, a collimation lens, and an optical fiber, wherein:

• the collimator block comprises a first mounting member and a second mounting member,
• wherein the first mounting member is provided with a through-hole mounting via, wherein the mounting via comprises a first via segment and a second via segment that are sequentially connected in a length direction of the mounting via, the first via segment is used to mount the collimation lens, the second via segment is used to insert an input end of the optical fiber, so that the input end of the optical fiber is optically connected to an output end of the collimation lens,
• the second mounting member comprises a connection portion and a mounting portion, the mounting portion is connected to a side of the connection portion away from the second via segment and close to the first via segment, the mounting portion is used to mount the beam expander lens assembly, so as to optically connect an output end of the beam expander lens assembly and an input end of the collimation lens, and
• a coefficient of thermal expansion of the second mounting member is less than a coefficient of thermal expansion of the first mounting member;
• the beam expander lens assembly is mounted on the mounting portion of the second mounting member of the collimator block;
• the collimation lens is mounted in the first via segment of the collimator block, and the input end of the collimation lens is optically connected to the output end of the beam expander lens assembly;
• and
• the input end of the optical fiber is inserted into the second via segment of the collimator block, so that the input end of the optical fiber is optically connected with the output end of the collimation lens.

A laser, comprising:

• a laser light source;
• and
• a collimation assembly comprising:
• a collimator block, beam expander lens assembly, a collimation lens, and an optical fiber, wherein:
• the collimator block comprises a first mounting member and a second mounting member,
• wherein the first mounting member is provided with a through-hole mounting via, wherein the mounting via comprises a first via segment and a second via segment that are sequentially connected in a length direction of the mounting via, the first via segment is used to mount the collimation lens, the second via segment is used to insert an input end of the optical fiber, so that the input end of the optical fiber is optically connected to an output end of the collimation lens,
• the second mounting member comprises a connection portion and a mounting portion, the mounting portion is connected to a side of the connection portion away from the second via segment and close to the first via segment, the mounting portion is used to mount the beam expander lens assembly, so as to optically connect an output end of the beam expander lens assembly and an input end of the collimation lens, and
• a coefficient of thermal expansion of the second mounting member is less than a coefficient of thermal expansion of the first mounting member;
• the beam expander lens assembly is mounted on the mounting portion of the second mounting member of the collimator block;
• the collimation lens is mounted in the first via segment of the collimator block, and the input end of the collimation lens is optically connected to the output end of the beam expander lens assembly;
• and
• the input end of the optical fiber is inserted into the second via segment of the collimator block, so that the input end of the optical fiber is optically connected with the output end of the collimation lens;
• wherein an input end of the beam expander lens assembly of the collimation assembly is optically connected to an output end of the laser light source.