Chirp of monolithic colliding pulse mode-locked diode lasers

Abstract

Spectrally resolved streak camera measurements of picosecond pulses emitted by hybridly colliding pulse mode-locked (CPM) laser diodes are presented in this letter. Depending on the modulation frequency both blue-chirped (upchirped) and red-chirped (downchirped) pulses can be observed. The two different regimes and the transition between them are characterized experimentally and the behavior is explained on the basis of our model for the CPM laser dynamics.

Monolithic mode-locked quantum dot lasers

“…This is due to the suppression of every second FP lasing mode as a result of the colliding pulse mode-locking mechanism. Colliding pulse mode-locking is achieved in QD lasers using an absorber section significantly longer than that typically used in CPM quantum well devices [27], where absorber length typically range from 15-80µm [28,29]. From the point of view of manufacturing quantum dot absorbers are very beneficial since (a) (b) a less precise control over the length and position of the QD absorber is be required.…”

Picosecond pulses with 40 W peak power from a passively mode‐locked tapered quantum well laser

“…This inverse correlation between refractive index and carrier density is often described in terms of Henry's α-factor. Since the gain section is much longer than the absorber section, the increase of the index in the gain section makes the largest contribution to the chirp of the pulse in passive mode-locking operation [10].…”

Ultrashort Pulse, Monolithic Modelocked Lasers for WDM Systems

“…Substituting (5), (10), and (15) where A ml is the corresponding term in (16) after averaging overZ. Simultaneous lasing of many coupled modes can be a steady state solution of system when the matrix A in the rate equation (21) has the eigenvalue of zero, which is called the supermode.…”