US 6,720,582 B2 · Semiconductor laser diode module

Abstract

A laser diode module in which a laser diode and an optical fiber are optically coupled with each other efficiently irrespective of an ambient temperature change within the laser diode module. The laser diode module includes a laser diode, an optical system, an optical system mounting member supporting at least a portion of the optical system, a laser diode mounting member, and a bottom plate supporting the laser diode, the optical system, the optical system mounting member, and the laser diode mounting member. The optical system receives and transmits a beam emitted from the laser diode through a lens portion to an optical fiber. The optical system mounting member is attached to the laser diode mounting member. The laser diode module preferably includes a thermo module having a first plate member attached to the laser diode mounting member. The laser diode mounting member is preferably formed of material having an expansion coefficient in a range between an expansion coefficient of the optical system mounting member and an expansion coefficient of the first plate member.

Claims39

Dependent claims

A laser diode module comprising:

a laser diode;
an optical system including an optical fiber and a lens portion, said optical system being configured to receive and transmit a beam emitted from said laser diode through said lens portion to said optical fiber along an optical axis;
an optical system mounting member configured to support at least a portion of said optical system;
a laser diode mounting member configured to support said laser diode, said optical system mounting member being attached to said laser diode mounting member;
a bottom plate configured to support said laser diode, said optical system, said optical system mounting member, and said laser diode mounting member;
and
a temperature control device thermally connected to said laser diode by said laser diode mounting member, said temperature control device being attached to said bottom plate,
wherein said optical system mounting member is not in direct contact with said temperature control device.

5 more elements

A semiconductor laser diode module comprising:

a laser diode;
an optical system including an optical fiber and a lens portion, said optical system being configured to receive and transmit a beam emitted from said laser diode through said lens portion to said optical fiber along an optical axis;
a fastening means for supporting at least a portion of said optical system;
a base configured to support said fastening means and said laser diode;
a bottom plate configured to support said laser diode, said optical system, said fastening means, and said base, wherein said base includes a laser diode mounting member and a fastening means mounting member, said laser diode mounting member having a laser diode mounting region configured to mount said laser diode, said fastening means mounting member being mounted to said laser diode mounting member at a position other than said laser diode mounting region;
and
a temperature control device thermally connected to said laser diode by said laser diode mounting member, said temperature control device being attached to said bottom plate,
wherein said fastening means mounting member is not in direct contact with said temperature control device.

5 more elements

Dependencies are inferred from the claim text.

Semiconductor laser diode module

Life of this patent

Semiconductor laser diode module

Life of this patent

Abstract

Claims39