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US 2026/0237964 A1Published application
Optical module
AssigneeMitsubishi Electric Corporation
InventorJunichi SUZUKI
Life of this patent
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Abstract
An optical module includes a temperature controller that performs a function of adjusting the temperature of a semiconductor laser, and an optical monitor that performs a function of monitoring an optical output from the semiconductor laser and monitoring an oscillation wavelength, the optical module includes a heater and a thermistor housed in a package, the heater and the thermistor are electrically connected in parallel, and one end of the heater and one end of the thermistor are connected to a heater-and-thermistor shared lead pin.
Claims12
An optical module comprising:
- a package including a stem and a windowed cap with a cylindrical shape, an open end surface of a side wall portion being fixed in contact with a peripheral end portion of an inner plane of the stem;
- a semiconductor laser housed in the package, to emit a laser beam from a window of the windowed cap;
- an optical monitor housed in the package, to receive a laser beam from the semiconductor laser and monitor a laser beam from the semiconductor laser;
- a temperature controller housed in the package, to execute control to change a temperature applied to the semiconductor laser and the optical monitor when a monitored value from the optical monitor deviates from a set monitored value, and to adjust a temperature of the semiconductor laser and a temperature of the optical monitor;
- a heater housed in the package;
- a thermistor housed in the package, the thermistor being electrically connected in parallel with the heater;
- a laser lead pin electrically insulated from and penetrating the stem, the laser lead pin having an inner lead portion exposed from the inner plane of the stem, the inner lead portion of the laser lead pin being connected to an electrode of the semiconductor laser;
- a monitor lead pin electrically insulated from and penetrating the stem, the monitor lead pin having an inner lead portion exposed from the inner plane of the stem, the inner lead portion of the monitor lead pin being connected to an output terminal of the optical monitor;
- a lead pin for a temperature controller electrically insulated from and penetrating the stem, the lead pin for the temperature controller having an inner lead portion exposed from the inner plane of the stem, the inner lead portion of the lead pin for the temperature controller being connected to an electrode of the temperature controller;
- a heater-and-thermistor shared lead pin electrically insulated from and penetrating the stem, the heater-and-thermistor shared lead pin having an inner lead portion exposed from the inner plane of the stem, the inner lead portion of the heater-and-thermistor shared lead pin being connected to a first end of the heater and a first end of the thermistor;
- and
- a ground lead pin electrically connected to the stem.
9 more elements
Dependencies are inferred from the claim text.