Pure frequency modulation of a multielectrode distributed-Bragg-reflector (DBR) laser diode

Journal Article · Sat Jul 01 04:00:00 EDT 1989 · IEEE Photonics Technology Letters; (USA)

DOI:https://doi.org/10.1109/68.36023· OSTI ID:5418586

Ishida, O; Toba, H ^[1]; Tohmori, Y ^[2]

---

1. NTT Transmission Systems Labs., 1-2356 Take Yokosuka-shi, Kanagawa 238-03 (JP)
2. NTT Opto-Electronics Labs., 3-1 Morinosato Wakamiya Atsugi-shi, Kanagawa 243-01 (JP)

Intensity-modulation (IM) suppressed frequency modulation (FM) is demonstrated over a 600 MHz bandwidth by using a three-electrode distributed-Bragg-reflector (DBR) laser diode (LD). A nonuniform carrier density distribution in the active region is realized by two separated electrodes, whose push-pull modulation yields only a 0.7 percent intensity fluctuation per 1 GHz frequency deviation. This corresponds to a 20 dB FM purity improvement. A third electrode on the DBR region makes it possible to tune the wavelength simultaneously. Because of its wider modulation bandwidth, the LD is suitable for the lightwave oscillator in frequency-shift keyed (FSK) transmissions and for linewidth reduction by electrical feedback.

• OSTI ID: 5418586
• Journal Information: IEEE Photonics Technology Letters; (USA), Journal Name: IEEE Photonics Technology Letters; (USA) Vol. 1:7; ISSN IPTLE; ISSN 1041-1135
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
BRAGG REFLECTION
CARRIER DENSITY
ELECTRICAL PUMPING
ELECTRODES
FREQUENCY MODULATION
LASERS
MODULATION
PHASE SHIFT
PUMPING
REFLECTION
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
SEMICONDUCTOR LASERS
SOLID STATE LASERS