Optical transmission module and optical transmitter
AssigneeSumitomo Electric Industries, Ltd.
InventorsHiromi Nakanishi, Yoshiki Kuhara
Life of this patent
Estimating the term…
Abstract
An optical transmission module is constructed in a configuration wherein a semiconductor laser is mounted on a stem-side emitter loading portion of a pole provided on a stem and wherein light emitted forward from the semiconductor laser is outputted through a condenser lens and others. A monitor photodiode is mounted on a receiver loading portion of the pole on the forward side of the semiconductor laser and the photodiode detects part of the light emitted forward from the semiconductor laser, to monitor the operating condition of the semiconductor laser. This configuration achieves decrease in the length of a lead pin and thus restrains deterioration of the waveform of the drive current to the semiconductor laser.
Claims8
An optical transmission module comprising:
- a stem as a base;
- a mount member provided substantially perpendicularly to the stem;
- a light emitting device mounted at a predetermined position on the mount member and configured to emit light along an axis of emission and forward in an opposite direction to the stem;
- light outputting means disposed on the forward side of the light emitting device and configured to output the light emitted from the light emitting device, as an optical signal;
- and
- a monitor light receiving device mounted at a position on the light outputting means side with respect to the light emitting device on the mount member and configured to detect part of the light emitted from the light emitting device.
An optical transmission module comprising:
- a stem as a base provided so as to intersect with a predetermined axis;
- a mount member mounted on the stem;
- a light emitting device mounted at a predetermined position on a loading surface extending along the predetermined axis of the mount member, and configured to emit light along the predetermined axis and in an opposite direction to the stem;
- and
- a monitor light receiving device mounted at such a position that the light emitting device is interposed between the stem and the light receiving device, on the loading surface of the mount member, and configured to detect part of the light emitted from the light emitting device.
Dependencies are inferred from the claim text.